./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2 --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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:20,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:20,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:20,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:20,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:20,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:20,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:20,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:20,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:20,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:20,244 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:20,244 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:20,244 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:20,245 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:20,245 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:20,246 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:20,246 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:20,247 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:20,247 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:20,247 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:20,248 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:20,248 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:20,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:20,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:20,250 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:20,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:20,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:20,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:20,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:20,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:20,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:20,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:20,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:20,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:20,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:20,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:20,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:20,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:20,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:20,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:20,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:20,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:20,257 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:20,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:20,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:20,258 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:20,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:20,258 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2024-11-02 12:27:20,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:20,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:20,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:20,620 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:20,620 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:20,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c Unable to find full path for "g++" [2024-11-02 12:27:22,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:22,898 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:22,899 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-02 12:27:22,909 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/data/e1d55179d/b6f5e8236780439bbc02ef6e4da001f6/FLAG71b6560ee [2024-11-02 12:27:23,274 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/data/e1d55179d/b6f5e8236780439bbc02ef6e4da001f6 [2024-11-02 12:27:23,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:23,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:23,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:23,283 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:23,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:23,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ff780b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23, skipping insertion in model container [2024-11-02 12:27:23,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,316 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:23,559 WARN L251 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_b83cb295-e50c-4821-8b4a-110302405438/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2024-11-02 12:27:23,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:23,578 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:23,599 WARN L251 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_b83cb295-e50c-4821-8b4a-110302405438/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2024-11-02 12:27:23,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:23,622 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:23,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23 WrapperNode [2024-11-02 12:27:23,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:23,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:23,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:23,624 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:23,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,665 INFO L138 Inliner]: procedures = 25, calls = 28, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 109 [2024-11-02 12:27:23,666 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:23,667 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:23,667 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:23,667 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:23,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,700 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:23,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:23,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:23,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:23,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (1/1) ... [2024-11-02 12:27:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:23,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:23,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 12:27:23,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 12:27:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 12:27:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-02 12:27:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-02 12:27:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:27:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:23,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:27:23,792 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-02 12:27:23,953 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:23,957 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:24,512 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 12:27:24,512 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:24,959 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:24,960 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-02 12:27:24,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:24 BoogieIcfgContainer [2024-11-02 12:27:24,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:24,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:24,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:24,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:24,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:23" (1/3) ... [2024-11-02 12:27:24,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0ad0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:24, skipping insertion in model container [2024-11-02 12:27:24,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:23" (2/3) ... [2024-11-02 12:27:24,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0ad0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:24, skipping insertion in model container [2024-11-02 12:27:24,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:24" (3/3) ... [2024-11-02 12:27:24,977 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-02 12:27:25,017 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:25,017 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:27:25,018 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 12:27:25,123 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-02 12:27:25,175 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 38 transitions, 97 flow [2024-11-02 12:27:25,281 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 393 states, 392 states have (on average 3.4183673469387754) internal successors, (1340), 392 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:25,318 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:25,325 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;@8f32ec4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:25,325 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-02 12:27:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 393 states, 392 states have (on average 3.4183673469387754) internal successors, (1340), 392 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 12:27:25,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:25,348 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] [2024-11-02 12:27:25,349 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:25,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 452573893, now seen corresponding path program 1 times [2024-11-02 12:27:25,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:25,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287221882] [2024-11-02 12:27:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:26,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287221882] [2024-11-02 12:27:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287221882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:26,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:26,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:27:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953268104] [2024-11-02 12:27:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:26,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:27:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:27:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:27:26,747 INFO L87 Difference]: Start difference. First operand has 393 states, 392 states have (on average 3.4183673469387754) internal successors, (1340), 392 states have internal predecessors, (1340), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2024-11-02 12:27:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:27,058 INFO L93 Difference]: Finished difference Result 742 states and 2533 transitions. [2024-11-02 12:27:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:27:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 [2024-11-02 12:27:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:27,118 INFO L225 Difference]: With dead ends: 742 [2024-11-02 12:27:27,118 INFO L226 Difference]: Without dead ends: 720 [2024-11-02 12:27:27,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:27:27,132 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:27,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2024-11-02 12:27:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 677. [2024-11-02 12:27:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.43491124260355) internal successors, (2322), 676 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2322 transitions. [2024-11-02 12:27:27,330 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2322 transitions. Word has length 20 [2024-11-02 12:27:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:27,331 INFO L471 AbstractCegarLoop]: Abstraction has 677 states and 2322 transitions. [2024-11-02 12:27:27,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2024-11-02 12:27:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2322 transitions. [2024-11-02 12:27:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:27:27,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:27,347 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] [2024-11-02 12:27:27,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:27,347 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:27,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1632682067, now seen corresponding path program 1 times [2024-11-02 12:27:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737767503] [2024-11-02 12:27:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:27,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:27,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737767503] [2024-11-02 12:27:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737767503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714887055] [2024-11-02 12:27:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:27,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:27:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:27,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:27:27,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:27,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:27,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714887055] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:27,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:27:27,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-02 12:27:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535941098] [2024-11-02 12:27:27,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:27,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:27,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:27:27,890 INFO L87 Difference]: Start difference. First operand 677 states and 2322 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:28,261 INFO L93 Difference]: Finished difference Result 1714 states and 5891 transitions. [2024-11-02 12:27:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:27:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2024-11-02 12:27:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:28,278 INFO L225 Difference]: With dead ends: 1714 [2024-11-02 12:27:28,278 INFO L226 Difference]: Without dead ends: 1324 [2024-11-02 12:27:28,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:27:28,283 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:28,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 34 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2024-11-02 12:27:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 678. [2024-11-02 12:27:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.431314623338257) internal successors, (2323), 677 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2323 transitions. [2024-11-02 12:27:28,371 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2323 transitions. Word has length 21 [2024-11-02 12:27:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:28,372 INFO L471 AbstractCegarLoop]: Abstraction has 678 states and 2323 transitions. [2024-11-02 12:27:28,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2323 transitions. [2024-11-02 12:27:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:27:28,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:28,381 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] [2024-11-02 12:27:28,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:28,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:28,587 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:28,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:28,587 INFO L85 PathProgramCache]: Analyzing trace with hash -373373349, now seen corresponding path program 1 times [2024-11-02 12:27:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934999708] [2024-11-02 12:27:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:28,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934999708] [2024-11-02 12:27:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934999708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:28,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:28,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:27:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819967510] [2024-11-02 12:27:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:28,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:27:28,704 INFO L87 Difference]: Start difference. First operand 678 states and 2323 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:28,970 INFO L93 Difference]: Finished difference Result 1262 states and 4339 transitions. [2024-11-02 12:27:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2024-11-02 12:27:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:28,980 INFO L225 Difference]: With dead ends: 1262 [2024-11-02 12:27:28,981 INFO L226 Difference]: Without dead ends: 959 [2024-11-02 12:27:28,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:28,984 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:28,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-02 12:27:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 822. [2024-11-02 12:27:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.382460414129111) internal successors, (2777), 821 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2777 transitions. [2024-11-02 12:27:29,074 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2777 transitions. Word has length 21 [2024-11-02 12:27:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:29,075 INFO L471 AbstractCegarLoop]: Abstraction has 822 states and 2777 transitions. [2024-11-02 12:27:29,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2777 transitions. [2024-11-02 12:27:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:27:29,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:29,081 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] [2024-11-02 12:27:29,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:27:29,081 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:29,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash 696233432, now seen corresponding path program 1 times [2024-11-02 12:27:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:29,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833255908] [2024-11-02 12:27:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:29,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:27:29,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833255908] [2024-11-02 12:27:29,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833255908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119888016] [2024-11-02 12:27:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:29,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:29,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:29,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:27:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:29,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:29,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:27:29,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:27:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119888016] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:29,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:27:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-02 12:27:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531571682] [2024-11-02 12:27:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:29,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:27:29,447 INFO L87 Difference]: Start difference. First operand 822 states and 2777 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:29,904 INFO L93 Difference]: Finished difference Result 1663 states and 5518 transitions. [2024-11-02 12:27:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:29,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2024-11-02 12:27:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:29,919 INFO L225 Difference]: With dead ends: 1663 [2024-11-02 12:27:29,919 INFO L226 Difference]: Without dead ends: 1516 [2024-11-02 12:27:29,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:27:29,923 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:29,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 42 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2024-11-02 12:27:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1051. [2024-11-02 12:27:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.3676190476190477) internal successors, (3536), 1050 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3536 transitions. [2024-11-02 12:27:30,085 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3536 transitions. Word has length 22 [2024-11-02 12:27:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:30,087 INFO L471 AbstractCegarLoop]: Abstraction has 1051 states and 3536 transitions. [2024-11-02 12:27:30,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3536 transitions. [2024-11-02 12:27:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:27:30,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:30,092 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, 1, 1, 1] [2024-11-02 12:27:30,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:30,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:30,298 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:30,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 601449783, now seen corresponding path program 1 times [2024-11-02 12:27:30,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574147620] [2024-11-02 12:27:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:30,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:30,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574147620] [2024-11-02 12:27:30,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574147620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493448652] [2024-11-02 12:27:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:30,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:30,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:30,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:30,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:27:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:30,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:30,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:30,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:30,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493448652] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:30,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:27:30,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-02 12:27:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708560312] [2024-11-02 12:27:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:30,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:27:30,750 INFO L87 Difference]: Start difference. First operand 1051 states and 3536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:31,208 INFO L93 Difference]: Finished difference Result 1889 states and 6302 transitions. [2024-11-02 12:27:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2024-11-02 12:27:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:31,224 INFO L225 Difference]: With dead ends: 1889 [2024-11-02 12:27:31,224 INFO L226 Difference]: Without dead ends: 1801 [2024-11-02 12:27:31,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:27:31,226 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:31,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2024-11-02 12:27:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 955. [2024-11-02 12:27:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.4161425576519915) internal successors, (3259), 954 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3259 transitions. [2024-11-02 12:27:31,362 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3259 transitions. Word has length 26 [2024-11-02 12:27:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:31,363 INFO L471 AbstractCegarLoop]: Abstraction has 955 states and 3259 transitions. [2024-11-02 12:27:31,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3259 transitions. [2024-11-02 12:27:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:27:31,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:31,368 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, 1, 1, 1] [2024-11-02 12:27:31,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:31,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:31,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:31,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 251609248, now seen corresponding path program 1 times [2024-11-02 12:27:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803613237] [2024-11-02 12:27:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:31,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803613237] [2024-11-02 12:27:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803613237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:31,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:27:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689785518] [2024-11-02 12:27:31,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:31,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:31,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:27:31,700 INFO L87 Difference]: Start difference. First operand 955 states and 3259 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:31,946 INFO L93 Difference]: Finished difference Result 1251 states and 4072 transitions. [2024-11-02 12:27:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:31,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2024-11-02 12:27:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:31,952 INFO L225 Difference]: With dead ends: 1251 [2024-11-02 12:27:31,953 INFO L226 Difference]: Without dead ends: 557 [2024-11-02 12:27:31,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:31,955 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:31,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2024-11-02 12:27:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2024-11-02 12:27:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.4154676258992804) internal successors, (1899), 556 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1899 transitions. [2024-11-02 12:27:32,004 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1899 transitions. Word has length 26 [2024-11-02 12:27:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:32,005 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 1899 transitions. [2024-11-02 12:27:32,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1899 transitions. [2024-11-02 12:27:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 12:27:32,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:32,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:32,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:27:32,012 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:32,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 645778834, now seen corresponding path program 1 times [2024-11-02 12:27:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509714717] [2024-11-02 12:27:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:32,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:32,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:32,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509714717] [2024-11-02 12:27:32,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509714717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:32,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554171609] [2024-11-02 12:27:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:32,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:32,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:32,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:27:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:32,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:32,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:32,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554171609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:32,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433290198] [2024-11-02 12:27:32,442 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:32,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:32,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-02 12:27:32,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426011622] [2024-11-02 12:27:32,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:32,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:27:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:27:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:27:32,446 INFO L87 Difference]: Start difference. First operand 557 states and 1899 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:32,725 INFO L93 Difference]: Finished difference Result 952 states and 3240 transitions. [2024-11-02 12:27:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:27:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-02 12:27:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:32,733 INFO L225 Difference]: With dead ends: 952 [2024-11-02 12:27:32,733 INFO L226 Difference]: Without dead ends: 713 [2024-11-02 12:27:32,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:27:32,734 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:32,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-11-02 12:27:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-11-02 12:27:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.4396067415730336) internal successors, (2449), 712 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2449 transitions. [2024-11-02 12:27:32,806 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2449 transitions. Word has length 32 [2024-11-02 12:27:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:32,808 INFO L471 AbstractCegarLoop]: Abstraction has 713 states and 2449 transitions. [2024-11-02 12:27:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2449 transitions. [2024-11-02 12:27:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-02 12:27:32,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:32,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:32,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:27:33,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:33,013 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:33,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1321012526, now seen corresponding path program 1 times [2024-11-02 12:27:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114708524] [2024-11-02 12:27:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:33,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114708524] [2024-11-02 12:27:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114708524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481034309] [2024-11-02 12:27:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:33,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:33,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:33,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:27:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:33,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:33,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:33,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481034309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:33,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934790461] [2024-11-02 12:27:33,656 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:33,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:33,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-02 12:27:33,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208425930] [2024-11-02 12:27:33,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:33,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-02 12:27:33,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-02 12:27:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:27:33,662 INFO L87 Difference]: Start difference. First operand 713 states and 2449 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:34,254 INFO L93 Difference]: Finished difference Result 1670 states and 5864 transitions. [2024-11-02 12:27:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:27:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2024-11-02 12:27:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:34,265 INFO L225 Difference]: With dead ends: 1670 [2024-11-02 12:27:34,265 INFO L226 Difference]: Without dead ends: 1033 [2024-11-02 12:27:34,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:27:34,268 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 134 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:34,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 35 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:27:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2024-11-02 12:27:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 987. [2024-11-02 12:27:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.3995943204868153) internal successors, (3352), 986 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3352 transitions. [2024-11-02 12:27:34,382 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3352 transitions. Word has length 33 [2024-11-02 12:27:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:34,383 INFO L471 AbstractCegarLoop]: Abstraction has 987 states and 3352 transitions. [2024-11-02 12:27:34,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3352 transitions. [2024-11-02 12:27:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 12:27:34,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:34,387 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, 1, 1, 1, 1] [2024-11-02 12:27:34,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:27:34,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:34,592 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:34,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash 781398801, now seen corresponding path program 2 times [2024-11-02 12:27:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173134392] [2024-11-02 12:27:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:34,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173134392] [2024-11-02 12:27:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173134392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034579542] [2024-11-02 12:27:34,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:27:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:34,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:34,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:27:34,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:27:34,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:34,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:27:34,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:35,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034579542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788401229] [2024-11-02 12:27:35,118 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:35,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-02 12:27:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365934912] [2024-11-02 12:27:35,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:35,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:27:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:27:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:27:35,122 INFO L87 Difference]: Start difference. First operand 987 states and 3352 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:35,625 INFO L93 Difference]: Finished difference Result 1974 states and 6706 transitions. [2024-11-02 12:27:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:27:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 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 37 [2024-11-02 12:27:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:35,635 INFO L225 Difference]: With dead ends: 1974 [2024-11-02 12:27:35,636 INFO L226 Difference]: Without dead ends: 989 [2024-11-02 12:27:35,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:27:35,641 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:35,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 64 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:27:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2024-11-02 12:27:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 989. [2024-11-02 12:27:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 3.3947368421052633) internal successors, (3354), 988 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 3354 transitions. [2024-11-02 12:27:35,759 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 3354 transitions. Word has length 37 [2024-11-02 12:27:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:35,759 INFO L471 AbstractCegarLoop]: Abstraction has 989 states and 3354 transitions. [2024-11-02 12:27:35,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 3354 transitions. [2024-11-02 12:27:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 12:27:35,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:35,764 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-02 12:27:35,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:27:35,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:35,968 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:35,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1821013156, now seen corresponding path program 3 times [2024-11-02 12:27:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:35,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571502323] [2024-11-02 12:27:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:27:36,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571502323] [2024-11-02 12:27:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571502323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396430878] [2024-11-02 12:27:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:27:36,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:36,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:27:36,231 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:27:36,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:36,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:36,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:27:36,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:27:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396430878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097343145] [2024-11-02 12:27:36,423 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:36,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-02 12:27:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630272821] [2024-11-02 12:27:36,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:36,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-02 12:27:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:36,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-02 12:27:36,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:27:36,425 INFO L87 Difference]: Start difference. First operand 989 states and 3354 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:37,184 INFO L93 Difference]: Finished difference Result 1682 states and 5804 transitions. [2024-11-02 12:27:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 12:27:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-02 12:27:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:37,201 INFO L225 Difference]: With dead ends: 1682 [2024-11-02 12:27:37,201 INFO L226 Difference]: Without dead ends: 1633 [2024-11-02 12:27:37,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:27:37,203 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:37,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 45 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:27:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2024-11-02 12:27:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1265. [2024-11-02 12:27:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.435126582278481) internal successors, (4342), 1264 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4342 transitions. [2024-11-02 12:27:37,376 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4342 transitions. Word has length 39 [2024-11-02 12:27:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:37,378 INFO L471 AbstractCegarLoop]: Abstraction has 1265 states and 4342 transitions. [2024-11-02 12:27:37,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4342 transitions. [2024-11-02 12:27:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:27:37,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:37,383 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1] [2024-11-02 12:27:37,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:27:37,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:27:37,585 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:37,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1472393799, now seen corresponding path program 4 times [2024-11-02 12:27:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503344373] [2024-11-02 12:27:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:27:37,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503344373] [2024-11-02 12:27:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503344373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411778416] [2024-11-02 12:27:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:27:37,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:37,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:37,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:27:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:37,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:27:37,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:27:38,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:27:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411778416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891982135] [2024-11-02 12:27:38,167 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:38,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:38,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-02 12:27:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586840919] [2024-11-02 12:27:38,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:38,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:27:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:27:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:27:38,169 INFO L87 Difference]: Start difference. First operand 1265 states and 4342 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:38,647 INFO L93 Difference]: Finished difference Result 1966 states and 6720 transitions. [2024-11-02 12:27:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:27:38,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 45 [2024-11-02 12:27:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:38,661 INFO L225 Difference]: With dead ends: 1966 [2024-11-02 12:27:38,662 INFO L226 Difference]: Without dead ends: 1543 [2024-11-02 12:27:38,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:27:38,664 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:38,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 61 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2024-11-02 12:27:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2024-11-02 12:27:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.4494163424124515) internal successors, (5319), 1542 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5319 transitions. [2024-11-02 12:27:38,838 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5319 transitions. Word has length 45 [2024-11-02 12:27:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:38,839 INFO L471 AbstractCegarLoop]: Abstraction has 1543 states and 5319 transitions. [2024-11-02 12:27:38,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5319 transitions. [2024-11-02 12:27:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:27:38,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:38,845 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2024-11-02 12:27:38,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-02 12:27:39,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:39,046 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:39,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1176272665, now seen corresponding path program 5 times [2024-11-02 12:27:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:39,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448868544] [2024-11-02 12:27:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:27:39,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448868544] [2024-11-02 12:27:39,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448868544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:39,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756591444] [2024-11-02 12:27:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:27:39,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:39,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:39,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 12:27:39,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:27:39,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:39,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:27:39,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:27:39,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:27:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756591444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:39,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108047876] [2024-11-02 12:27:39,810 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:39,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:39,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-02 12:27:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584077628] [2024-11-02 12:27:39,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:39,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:27:39,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:27:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:27:39,814 INFO L87 Difference]: Start difference. First operand 1543 states and 5319 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:41,205 INFO L93 Difference]: Finished difference Result 3484 states and 12176 transitions. [2024-11-02 12:27:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-02 12:27:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 46 [2024-11-02 12:27:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:41,236 INFO L225 Difference]: With dead ends: 3484 [2024-11-02 12:27:41,236 INFO L226 Difference]: Without dead ends: 2787 [2024-11-02 12:27:41,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2024-11-02 12:27:41,240 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:41,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 68 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:27:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2024-11-02 12:27:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2167. [2024-11-02 12:27:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.4621421975992615) internal successors, (7499), 2166 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7499 transitions. [2024-11-02 12:27:41,550 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7499 transitions. Word has length 46 [2024-11-02 12:27:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:41,550 INFO L471 AbstractCegarLoop]: Abstraction has 2167 states and 7499 transitions. [2024-11-02 12:27:41,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7499 transitions. [2024-11-02 12:27:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:27:41,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:41,559 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2024-11-02 12:27:41,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-02 12:27:41,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:41,763 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:41,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 985698006, now seen corresponding path program 6 times [2024-11-02 12:27:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:41,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939203431] [2024-11-02 12:27:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:27:41,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939203431] [2024-11-02 12:27:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939203431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808145526] [2024-11-02 12:27:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:27:41,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:41,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:41,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 12:27:42,092 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:27:42,092 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:42,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:27:42,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:27:42,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:27:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808145526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:42,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9133358] [2024-11-02 12:27:42,390 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:42,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:42,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-02 12:27:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755985906] [2024-11-02 12:27:42,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:42,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 12:27:42,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 12:27:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:27:42,395 INFO L87 Difference]: Start difference. First operand 2167 states and 7499 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:44,609 INFO L93 Difference]: Finished difference Result 6270 states and 21903 transitions. [2024-11-02 12:27:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-02 12:27:44,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-02 12:27:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:44,676 INFO L225 Difference]: With dead ends: 6270 [2024-11-02 12:27:44,676 INFO L226 Difference]: Without dead ends: 3953 [2024-11-02 12:27:44,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2024-11-02 12:27:44,683 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 386 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:44,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 155 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 12:27:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2024-11-02 12:27:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 2725. [2024-11-02 12:27:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.4842143906020557) internal successors, (9491), 2724 states have internal predecessors, (9491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 9491 transitions. [2024-11-02 12:27:45,115 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 9491 transitions. Word has length 50 [2024-11-02 12:27:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:45,115 INFO L471 AbstractCegarLoop]: Abstraction has 2725 states and 9491 transitions. [2024-11-02 12:27:45,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 9491 transitions. [2024-11-02 12:27:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-02 12:27:45,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:45,125 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-02 12:27:45,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-02 12:27:45,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:45,356 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:45,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1695168215, now seen corresponding path program 7 times [2024-11-02 12:27:45,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:45,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310428566] [2024-11-02 12:27:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:45,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:27:45,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:45,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310428566] [2024-11-02 12:27:45,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310428566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:45,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312376754] [2024-11-02 12:27:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:27:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:45,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:45,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-02 12:27:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:45,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:27:45,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:27:45,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:27:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312376754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:46,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172363848] [2024-11-02 12:27:46,071 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:46,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-02 12:27:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060147737] [2024-11-02 12:27:46,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:46,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 12:27:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 12:27:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:27:46,073 INFO L87 Difference]: Start difference. First operand 2725 states and 9491 transitions. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:46,715 INFO L93 Difference]: Finished difference Result 3960 states and 13886 transitions. [2024-11-02 12:27:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:27:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-02 12:27:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:46,741 INFO L225 Difference]: With dead ends: 3960 [2024-11-02 12:27:46,741 INFO L226 Difference]: Without dead ends: 3901 [2024-11-02 12:27:46,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2024-11-02 12:27:46,745 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:46,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 48 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2024-11-02 12:27:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2505. [2024-11-02 12:27:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.478035143769968) internal successors, (8709), 2504 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8709 transitions. [2024-11-02 12:27:47,115 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8709 transitions. Word has length 52 [2024-11-02 12:27:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:47,116 INFO L471 AbstractCegarLoop]: Abstraction has 2505 states and 8709 transitions. [2024-11-02 12:27:47,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8709 transitions. [2024-11-02 12:27:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-02 12:27:47,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:47,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:47,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:47,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-02 12:27:47,330 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:27:47,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1972994150, now seen corresponding path program 8 times [2024-11-02 12:27:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101068458] [2024-11-02 12:27:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 12:27:47,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101068458] [2024-11-02 12:27:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101068458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122985228] [2024-11-02 12:27:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:27:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:47,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:47,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83cb295-e50c-4821-8b4a-110302405438/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-02 12:27:47,861 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:27:47,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:47,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:27:47,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-02 12:27:48,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-02 12:27:48,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122985228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:48,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486113751] [2024-11-02 12:27:48,153 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:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$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:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) 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) [2024-11-02 12:27:48,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-02 12:27:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822653512] [2024-11-02 12:27:48,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:48,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:27:48,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:27:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:27:48,157 INFO L87 Difference]: Start difference. First operand 2505 states and 8709 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)