./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/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_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/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_36992440-cf19-422d-ab46-df9fe88a2b5c/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 e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:40,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:40,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:40,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:40,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:40,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:40,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:40,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:40,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:40,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:40,762 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:40,763 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:40,763 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:40,764 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:40,764 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:40,766 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:40,767 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:40,767 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:40,768 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:40,771 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:40,771 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:40,772 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:40,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:40,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:40,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:40,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:40,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:40,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:40,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:40,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:40,779 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:40,780 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:40,780 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:40,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:40,781 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:40,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:40,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:40,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:40,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:40,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:40,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:40,785 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:40,785 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:40,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:40,786 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:40,786 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:40,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:40,787 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_36992440-cf19-422d-ab46-df9fe88a2b5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-11-02 11:25:41,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:41,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:41,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:41,191 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:41,191 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:41,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c Unable to find full path for "g++" [2024-11-02 11:25:43,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:43,474 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:43,478 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-02 11:25:43,490 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/data/e5b1b52ad/cb8c3e22922441e9877e5529570bf025/FLAG22d083d36 [2024-11-02 11:25:43,506 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/data/e5b1b52ad/cb8c3e22922441e9877e5529570bf025 [2024-11-02 11:25:43,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:43,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:43,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:43,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:43,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:43,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:43,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d1677e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43, skipping insertion in model container [2024-11-02 11:25:43,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:43,564 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:43,885 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_36992440-cf19-422d-ab46-df9fe88a2b5c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2776,2789] [2024-11-02 11:25:43,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:43,912 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:43,947 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_36992440-cf19-422d-ab46-df9fe88a2b5c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2776,2789] [2024-11-02 11:25:43,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:43,976 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:43,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43 WrapperNode [2024-11-02 11:25:43,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:43,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:43,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:43,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:43,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:43,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,039 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 194 [2024-11-02 11:25:44,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:44,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:44,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:44,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:44,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:44,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:44,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:44,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:44,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (1/1) ... [2024-11-02 11:25:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:44,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:44,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 11:25:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 11:25:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 11:25:44,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 11:25:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-02 11:25:44,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-02 11:25:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:25:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:25:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:44,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:25:44,184 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 11:25:44,346 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:44,350 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:45,030 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 11:25:45,030 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:45,597 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:45,597 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 11:25:45,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:45 BoogieIcfgContainer [2024-11-02 11:25:45,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:45,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:45,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:45,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:45,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:43" (1/3) ... [2024-11-02 11:25:45,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1975ba35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:45, skipping insertion in model container [2024-11-02 11:25:45,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:43" (2/3) ... [2024-11-02 11:25:45,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1975ba35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:45, skipping insertion in model container [2024-11-02 11:25:45,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:45" (3/3) ... [2024-11-02 11:25:45,613 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-11-02 11:25:45,636 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:45,636 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:25:45,637 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 11:25:45,703 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-02 11:25:45,742 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 40 transitions, 101 flow [2024-11-02 11:25:45,848 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 347 states have (on average 3.8155619596541785) internal successors, (1324), 347 states have internal predecessors, (1324), 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 11:25:45,883 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:45,890 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;@54ee902e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:45,890 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-02 11:25:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 347 states have (on average 3.8155619596541785) internal successors, (1324), 347 states have internal predecessors, (1324), 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 11:25:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:25:45,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:45,911 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] [2024-11-02 11:25:45,912 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 11:25:45,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:45,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1380164195, now seen corresponding path program 1 times [2024-11-02 11:25:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:45,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425983447] [2024-11-02 11:25:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:45,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:46,792 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 11:25:46,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425983447] [2024-11-02 11:25:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425983447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:46,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:46,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586051495] [2024-11-02 11:25:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:46,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:46,827 INFO L87 Difference]: Start difference. First operand has 348 states, 347 states have (on average 3.8155619596541785) internal successors, (1324), 347 states have internal predecessors, (1324), 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 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 11:25:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:47,022 INFO L93 Difference]: Finished difference Result 864 states and 3288 transitions. [2024-11-02 11:25:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2024-11-02 11:25:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:47,047 INFO L225 Difference]: With dead ends: 864 [2024-11-02 11:25:47,047 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 11:25:47,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:47,060 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:47,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 11:25:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-11-02 11:25:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.807471264367816) internal successors, (1325), 348 states have internal predecessors, (1325), 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 11:25:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1325 transitions. [2024-11-02 11:25:47,151 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1325 transitions. Word has length 24 [2024-11-02 11:25:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:47,151 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 1325 transitions. [2024-11-02 11:25:47,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 11:25:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1325 transitions. [2024-11-02 11:25:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 11:25:47,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:47,157 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] [2024-11-02 11:25:47,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:25:47,158 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 11:25:47,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 402087988, now seen corresponding path program 1 times [2024-11-02 11:25:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93650194] [2024-11-02 11:25:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:47,551 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 11:25:47,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:47,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93650194] [2024-11-02 11:25:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93650194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262458661] [2024-11-02 11:25:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:47,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:47,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:25:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:47,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:25:47,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:48,084 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 11:25:48,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:48,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:25:48,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2024-11-02 11:25:48,422 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 11:25:48,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262458661] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:48,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:25:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2024-11-02 11:25:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859141707] [2024-11-02 11:25:48,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:48,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:25:48,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:25:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-02 11:25:48,427 INFO L87 Difference]: Start difference. First operand 349 states and 1325 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 11:25:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:48,661 INFO L93 Difference]: Finished difference Result 725 states and 2616 transitions. [2024-11-02 11:25:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:25:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 25 [2024-11-02 11:25:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:48,673 INFO L225 Difference]: With dead ends: 725 [2024-11-02 11:25:48,674 INFO L226 Difference]: Without dead ends: 568 [2024-11-02 11:25:48,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-02 11:25:48,678 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:48,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 13 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:25:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-11-02 11:25:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 411. [2024-11-02 11:25:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.795121951219512) internal successors, (1556), 410 states have internal predecessors, (1556), 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 11:25:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1556 transitions. [2024-11-02 11:25:48,724 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1556 transitions. Word has length 25 [2024-11-02 11:25:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:48,725 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 1556 transitions. [2024-11-02 11:25:48,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 11:25:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1556 transitions. [2024-11-02 11:25:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 11:25:48,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:48,729 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 11:25:48,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:25:48,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:48,934 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 11:25:48,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -79930298, now seen corresponding path program 1 times [2024-11-02 11:25:48,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401517738] [2024-11-02 11:25:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:49,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401517738] [2024-11-02 11:25:49,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401517738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:49,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:49,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557619665] [2024-11-02 11:25:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:49,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:25:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:25:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:49,132 INFO L87 Difference]: Start difference. First operand 411 states and 1556 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 11:25:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:49,339 INFO L93 Difference]: Finished difference Result 819 states and 3108 transitions. [2024-11-02 11:25:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:25:49,340 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 11:25:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:49,347 INFO L225 Difference]: With dead ends: 819 [2024-11-02 11:25:49,347 INFO L226 Difference]: Without dead ends: 412 [2024-11-02 11:25:49,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:25:49,353 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:49,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 12 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-02 11:25:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2024-11-02 11:25:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.7883211678832116) internal successors, (1557), 411 states have internal predecessors, (1557), 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 11:25:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1557 transitions. [2024-11-02 11:25:49,398 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1557 transitions. Word has length 26 [2024-11-02 11:25:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:49,399 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 1557 transitions. [2024-11-02 11:25:49,399 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 11:25:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1557 transitions. [2024-11-02 11:25:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-02 11:25:49,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:49,402 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] [2024-11-02 11:25:49,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:25:49,402 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 11:25:49,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1123217661, now seen corresponding path program 1 times [2024-11-02 11:25:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:49,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918301694] [2024-11-02 11:25:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:49,901 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 11:25:49,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918301694] [2024-11-02 11:25:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918301694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360322744] [2024-11-02 11:25:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:49,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:25:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:50,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:25:50,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:50,298 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 11:25:50,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:50,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:25:50,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2024-11-02 11:25:50,518 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 11:25:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360322744] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:25:50,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2024-11-02 11:25:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360257272] [2024-11-02 11:25:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:50,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:25:50,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:25:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-02 11:25:50,521 INFO L87 Difference]: Start difference. First operand 412 states and 1557 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 11:25:50,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:50,864 INFO L93 Difference]: Finished difference Result 1052 states and 3810 transitions. [2024-11-02 11:25:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:25:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 27 [2024-11-02 11:25:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:50,872 INFO L225 Difference]: With dead ends: 1052 [2024-11-02 11:25:50,872 INFO L226 Difference]: Without dead ends: 890 [2024-11-02 11:25:50,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-02 11:25:50,877 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:50,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 22 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:25:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2024-11-02 11:25:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 489. [2024-11-02 11:25:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.776639344262295) internal successors, (1843), 488 states have internal predecessors, (1843), 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 11:25:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1843 transitions. [2024-11-02 11:25:50,936 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1843 transitions. Word has length 27 [2024-11-02 11:25:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:50,937 INFO L471 AbstractCegarLoop]: Abstraction has 489 states and 1843 transitions. [2024-11-02 11:25:50,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 11:25:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1843 transitions. [2024-11-02 11:25:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:25:50,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:50,940 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] [2024-11-02 11:25:50,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 11:25:51,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:51,141 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 11:25:51,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash -497652090, now seen corresponding path program 1 times [2024-11-02 11:25:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:51,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800822828] [2024-11-02 11:25:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:51,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 11:25:51,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800822828] [2024-11-02 11:25:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800822828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:51,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:51,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:51,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462469340] [2024-11-02 11:25:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:51,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:25:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:25:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:51,314 INFO L87 Difference]: Start difference. First operand 489 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 11:25:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:51,525 INFO L93 Difference]: Finished difference Result 973 states and 3679 transitions. [2024-11-02 11:25:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:25:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2024-11-02 11:25:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:51,532 INFO L225 Difference]: With dead ends: 973 [2024-11-02 11:25:51,532 INFO L226 Difference]: Without dead ends: 490 [2024-11-02 11:25:51,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 11:25:51,535 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:51,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-02 11:25:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2024-11-02 11:25:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.770961145194274) internal successors, (1844), 489 states have internal predecessors, (1844), 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 11:25:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1844 transitions. [2024-11-02 11:25:51,619 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1844 transitions. Word has length 28 [2024-11-02 11:25:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:51,619 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 1844 transitions. [2024-11-02 11:25:51,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 11:25:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1844 transitions. [2024-11-02 11:25:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 11:25:51,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:51,622 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] [2024-11-02 11:25:51,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:25:51,623 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 11:25:51,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash 46300120, now seen corresponding path program 1 times [2024-11-02 11:25:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:51,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031338851] [2024-11-02 11:25:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:51,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031338851] [2024-11-02 11:25:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031338851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724828504] [2024-11-02 11:25:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:51,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:51,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:51,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:51,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:25:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:52,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 11:25:52,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:52,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724828504] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:52,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:25:52,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-11-02 11:25:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264962324] [2024-11-02 11:25:52,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:52,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:25:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:25:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-02 11:25:52,439 INFO L87 Difference]: Start difference. First operand 490 states and 1844 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:25:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:52,787 INFO L93 Difference]: Finished difference Result 1131 states and 4150 transitions. [2024-11-02 11:25:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:25:52,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-02 11:25:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:52,799 INFO L225 Difference]: With dead ends: 1131 [2024-11-02 11:25:52,799 INFO L226 Difference]: Without dead ends: 970 [2024-11-02 11:25:52,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-02 11:25:52,801 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:52,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 16 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:25:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2024-11-02 11:25:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 569. [2024-11-02 11:25:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.7693661971830985) internal successors, (2141), 568 states have internal predecessors, (2141), 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 11:25:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2141 transitions. [2024-11-02 11:25:52,942 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2141 transitions. Word has length 29 [2024-11-02 11:25:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:52,943 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 2141 transitions. [2024-11-02 11:25:52,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:25:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2141 transitions. [2024-11-02 11:25:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 11:25:52,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:52,946 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] [2024-11-02 11:25:52,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 11:25:53,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:53,147 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 11:25:53,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1630144247, now seen corresponding path program 1 times [2024-11-02 11:25:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:53,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632752062] [2024-11-02 11:25:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:53,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:25:54,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632752062] [2024-11-02 11:25:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632752062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 11:25:54,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614689454] [2024-11-02 11:25:54,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:54,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:25:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:54,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:25:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:25:54,809 INFO L87 Difference]: Start difference. First operand 569 states and 2141 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:25:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:55,210 INFO L93 Difference]: Finished difference Result 1055 states and 3756 transitions. [2024-11-02 11:25:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:25:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-02 11:25:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:55,220 INFO L225 Difference]: With dead ends: 1055 [2024-11-02 11:25:55,220 INFO L226 Difference]: Without dead ends: 1007 [2024-11-02 11:25:55,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:25:55,221 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:55,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:25:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-02 11:25:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 859. [2024-11-02 11:25:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.625874125874126) internal successors, (3111), 858 states have internal predecessors, (3111), 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 11:25:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3111 transitions. [2024-11-02 11:25:55,399 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3111 transitions. Word has length 30 [2024-11-02 11:25:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:55,399 INFO L471 AbstractCegarLoop]: Abstraction has 859 states and 3111 transitions. [2024-11-02 11:25:55,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:25:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3111 transitions. [2024-11-02 11:25:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 11:25:55,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:55,404 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] [2024-11-02 11:25:55,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:25:55,404 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 11:25:55,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1193272027, now seen corresponding path program 1 times [2024-11-02 11:25:55,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:55,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126102317] [2024-11-02 11:25:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:57,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:57,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126102317] [2024-11-02 11:25:57,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126102317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57010242] [2024-11-02 11:25:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:57,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:57,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:57,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36992440-cf19-422d-ab46-df9fe88a2b5c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:25:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:57,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 11:25:57,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:25:57,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:59,164 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-11-02 11:25:59,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-11-02 11:26:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:26:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57010242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516172636] [2024-11-02 11:26:12,326 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 11:26:12,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-11-02 11:26:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110854552] [2024-11-02 11:26:12,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:12,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-02 11:26:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-02 11:26:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2024-11-02 11:26:12,331 INFO L87 Difference]: Start difference. First operand 859 states and 3111 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 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)