./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:16:14,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:16:15,025 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:16:15,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:16:15,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:16:15,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:16:15,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:16:15,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:16:15,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:16:15,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:16:15,063 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:16:15,064 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:16:15,064 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:16:15,065 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:16:15,065 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:16:15,065 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:16:15,065 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:16:15,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:16:15,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:16:15,066 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:16:15,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:16:15,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:15,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:16:15,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:16:15,069 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:16:15,069 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:16:15,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:16:15,069 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2024-11-14 04:16:15,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:16:15,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:16:15,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:16:15,486 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:16:15,487 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:16:15,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i Unable to find full path for "g++" [2024-11-14 04:16:17,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:16:18,424 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:16:18,424 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2024-11-14 04:16:18,443 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/data/90e0e9a9a/ac2b49a0de4a41d3bb6e3afe7740cd4a/FLAG020f05378 [2024-11-14 04:16:18,467 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/data/90e0e9a9a/ac2b49a0de4a41d3bb6e3afe7740cd4a [2024-11-14 04:16:18,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:16:18,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:16:18,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:18,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:16:18,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:16:18,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:18" (1/1) ... [2024-11-14 04:16:18,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@566760fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:18, skipping insertion in model container [2024-11-14 04:16:18,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:18" (1/1) ... [2024-11-14 04:16:18,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:16:18,852 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 04:16:18,856 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 04:16:18,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:18,877 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:16:18,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:19,008 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:16:19,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19 WrapperNode [2024-11-14 04:16:19,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:19,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:19,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:16:19,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:16:19,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,041 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,072 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2024-11-14 04:16:19,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:19,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:16:19,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:16:19,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:16:19,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:16:19,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:16:19,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:16:19,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:16:19,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (1/1) ... [2024-11-14 04:16:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:19,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:16:19,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:16:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:16:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:16:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:16:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:16:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:16:19,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:16:19,364 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:16:19,367 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:16:19,651 INFO L? ?]: Removed 62 outVars from TransFormulas that were not future-live. [2024-11-14 04:16:19,652 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:16:19,757 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:16:19,758 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 04:16:19,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:19 BoogieIcfgContainer [2024-11-14 04:16:19,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:16:19,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:16:19,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:16:19,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:16:19,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:16:18" (1/3) ... [2024-11-14 04:16:19,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5205c71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:19, skipping insertion in model container [2024-11-14 04:16:19,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:19" (2/3) ... [2024-11-14 04:16:19,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5205c71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:19, skipping insertion in model container [2024-11-14 04:16:19,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:19" (3/3) ... [2024-11-14 04:16:19,770 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2024-11-14 04:16:19,791 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:16:19,794 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcmp-alloca-1.i that has 1 procedures, 36 locations, 1 initial locations, 3 loop locations, and 19 error locations. [2024-11-14 04:16:19,844 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:16:19,867 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=None, 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;@19b36241, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:16:19,867 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-14 04:16:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 2.5) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:16:19,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:19,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:16:19,884 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:19,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 137200, now seen corresponding path program 1 times [2024-11-14 04:16:19,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173745908] [2024-11-14 04:16:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:20,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173745908] [2024-11-14 04:16:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173745908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:16:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682469834] [2024-11-14 04:16:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:20,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:20,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:20,374 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 2.5) internal successors, (40), 35 states have internal predecessors, (40), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:20,500 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-14 04:16:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2024-11-14 04:16:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:20,512 INFO L225 Difference]: With dead ends: 34 [2024-11-14 04:16:20,513 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 04:16:20,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:20,521 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:20,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 04:16:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 04:16:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 2.25) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-11-14 04:16:20,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 3 [2024-11-14 04:16:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:20,557 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-11-14 04:16:20,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-11-14 04:16:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:16:20,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:20,558 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:16:20,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:16:20,559 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:20,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 137201, now seen corresponding path program 1 times [2024-11-14 04:16:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:20,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953113632] [2024-11-14 04:16:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:21,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953113632] [2024-11-14 04:16:21,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953113632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:21,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:21,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:21,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222224745] [2024-11-14 04:16:21,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:21,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:21,100 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:21,264 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-14 04:16:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2024-11-14 04:16:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:21,266 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:16:21,266 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:16:21,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:21,267 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:21,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:16:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 04:16:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 2.1875) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-14 04:16:21,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2024-11-14 04:16:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:21,276 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-14 04:16:21,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-14 04:16:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:16:21,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:21,277 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:16:21,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:16:21,278 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:21,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 4333438, now seen corresponding path program 1 times [2024-11-14 04:16:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:21,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400234451] [2024-11-14 04:16:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:21,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:21,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400234451] [2024-11-14 04:16:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400234451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:16:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236382674] [2024-11-14 04:16:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:21,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:21,435 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:21,503 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-14 04:16:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-11-14 04:16:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:21,504 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:16:21,504 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:16:21,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:16:21,506 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:21,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:16:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 04:16:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 2.0625) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-14 04:16:21,510 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 4 [2024-11-14 04:16:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:21,510 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-14 04:16:21,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-14 04:16:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:16:21,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:21,511 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:16:21,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:16:21,511 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:21,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash 4333439, now seen corresponding path program 1 times [2024-11-14 04:16:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:21,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130675175] [2024-11-14 04:16:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:21,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:21,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130675175] [2024-11-14 04:16:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130675175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:21,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:21,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129705657] [2024-11-14 04:16:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:21,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:21,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:21,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:21,857 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:22,002 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-14 04:16:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2024-11-14 04:16:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:22,004 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:16:22,005 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:16:22,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:22,007 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:22,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:16:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 04:16:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 2.0) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-14 04:16:22,019 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 4 [2024-11-14 04:16:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:22,020 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-14 04:16:22,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-14 04:16:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:16:22,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:22,021 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:16:22,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:16:22,021 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:22,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 4335586, now seen corresponding path program 1 times [2024-11-14 04:16:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031586861] [2024-11-14 04:16:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:22,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031586861] [2024-11-14 04:16:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031586861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:22,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:22,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:22,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172855608] [2024-11-14 04:16:22,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:22,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:22,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:22,381 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:22,473 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-14 04:16:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2024-11-14 04:16:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:22,474 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:16:22,476 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:16:22,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:22,478 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:22,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:16:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 04:16:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-14 04:16:22,487 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 4 [2024-11-14 04:16:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:22,487 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-14 04:16:22,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-14 04:16:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:16:22,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:22,488 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:16:22,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:16:22,490 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:22,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 134403157, now seen corresponding path program 1 times [2024-11-14 04:16:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932812083] [2024-11-14 04:16:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:22,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:22,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932812083] [2024-11-14 04:16:22,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932812083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:22,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:22,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379450066] [2024-11-14 04:16:22,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:22,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:22,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:22,860 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:22,933 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-14 04:16:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2024-11-14 04:16:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:22,936 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:16:22,936 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:16:22,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:22,937 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:22,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:16:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 04:16:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-14 04:16:22,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 5 [2024-11-14 04:16:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:22,946 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-14 04:16:22,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-14 04:16:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:16:22,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:22,948 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 04:16:22,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:16:22,948 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:22,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -130479272, now seen corresponding path program 1 times [2024-11-14 04:16:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303111295] [2024-11-14 04:16:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:23,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303111295] [2024-11-14 04:16:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303111295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361425613] [2024-11-14 04:16:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:23,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:23,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:23,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:16:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:23,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:16:23,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:23,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-14 04:16:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:23,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:16:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:23,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:24,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361425613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985939708] [2024-11-14 04:16:24,255 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 04:16:24,256 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:24,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:24,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:24,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:25,385 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:26,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '489#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127) (exists ((|v_ULTIMATE.start_main_~i~1#1_37| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_37|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_37| 2) |ULTIMATE.start_main_~length2~0#1|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_37|))))' at error location [2024-11-14 04:16:26,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:26,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 13 [2024-11-14 04:16:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970541660] [2024-11-14 04:16:26,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:16:26,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:16:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:16:26,081 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:26,350 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-14 04:16:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:16:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 6 [2024-11-14 04:16:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:26,352 INFO L225 Difference]: With dead ends: 29 [2024-11-14 04:16:26,352 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:16:26,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:16:26,355 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:26,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:16:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 04:16:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.875) internal successors, (30), 26 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) [2024-11-14 04:16:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-14 04:16:26,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2024-11-14 04:16:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:26,362 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-14 04:16:26,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-14 04:16:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:16:26,362 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:26,362 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:16:26,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:16:26,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:26,571 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:26,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -128468068, now seen corresponding path program 1 times [2024-11-14 04:16:26,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:26,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324710033] [2024-11-14 04:16:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:26,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:26,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324710033] [2024-11-14 04:16:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324710033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:26,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230760024] [2024-11-14 04:16:26,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:26,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:26,647 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:26,723 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-14 04:16:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2024-11-14 04:16:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:26,724 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:16:26,724 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:16:26,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:26,726 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:26,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:16:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 04:16:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 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) [2024-11-14 04:16:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 04:16:26,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2024-11-14 04:16:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:26,729 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 04:16:26,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 04:16:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:16:26,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:26,730 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:16:26,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:16:26,730 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:26,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash -128468067, now seen corresponding path program 1 times [2024-11-14 04:16:26,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:26,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713155931] [2024-11-14 04:16:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:26,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:26,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713155931] [2024-11-14 04:16:26,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713155931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:26,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:26,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459178019] [2024-11-14 04:16:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:26,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:26,831 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:26,924 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-14 04:16:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2024-11-14 04:16:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:26,925 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:16:26,925 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:16:26,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:26,926 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:26,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:16:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 04:16:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 24 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) [2024-11-14 04:16:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 04:16:26,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2024-11-14 04:16:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:26,935 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 04:16:26,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 04:16:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:16:26,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:26,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:26,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:16:26,936 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:26,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash 312458585, now seen corresponding path program 1 times [2024-11-14 04:16:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:26,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828462877] [2024-11-14 04:16:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:27,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:27,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828462877] [2024-11-14 04:16:27,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828462877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:27,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:27,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580089083] [2024-11-14 04:16:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:27,131 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,222 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-14 04:16:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2024-11-14 04:16:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,223 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:16:27,224 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:16:27,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:27,225 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:16:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 04:16:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 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) [2024-11-14 04:16:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 04:16:27,228 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2024-11-14 04:16:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,228 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 04:16:27,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 04:16:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:16:27,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,229 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 04:16:27,230 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:27,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash 312458584, now seen corresponding path program 1 times [2024-11-14 04:16:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506747958] [2024-11-14 04:16:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:27,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:27,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506747958] [2024-11-14 04:16:27,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506747958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:27,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:27,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:16:27,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722700241] [2024-11-14 04:16:27,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:27,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:27,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:27,300 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,372 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-14 04:16:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:27,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2024-11-14 04:16:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,373 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:16:27,373 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:16:27,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:27,374 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:16:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 04:16:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 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) [2024-11-14 04:16:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 04:16:27,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2024-11-14 04:16:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,384 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 04:16:27,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 04:16:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:16:27,385 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,385 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:16:27,386 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:27,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -375010247, now seen corresponding path program 1 times [2024-11-14 04:16:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236772188] [2024-11-14 04:16:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:27,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236772188] [2024-11-14 04:16:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236772188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:27,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:16:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722141876] [2024-11-14 04:16:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:27,458 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,546 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-14 04:16:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2024-11-14 04:16:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,547 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:16:27,547 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:16:27,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:27,548 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:16:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-14 04:16:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 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) [2024-11-14 04:16:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-14 04:16:27,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2024-11-14 04:16:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,553 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-14 04:16:27,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-14 04:16:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:16:27,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,555 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:16:27,556 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:27,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -375010246, now seen corresponding path program 1 times [2024-11-14 04:16:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011476025] [2024-11-14 04:16:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:27,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011476025] [2024-11-14 04:16:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011476025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:27,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:27,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:16:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995418802] [2024-11-14 04:16:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:16:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:16:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:27,705 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,797 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 04:16:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2024-11-14 04:16:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,798 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:16:27,798 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:16:27,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:27,801 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:16:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-11-14 04:16:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.5) internal successors, (30), 25 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) [2024-11-14 04:16:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 04:16:27,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2024-11-14 04:16:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,808 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 04:16:27,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 04:16:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:16:27,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,809 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 04:16:27,809 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:27,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1259583232, now seen corresponding path program 1 times [2024-11-14 04:16:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043152715] [2024-11-14 04:16:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:27,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043152715] [2024-11-14 04:16:27,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043152715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:27,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:27,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:16:27,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889067904] [2024-11-14 04:16:27,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:27,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:16:27,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:16:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:16:27,896 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:27,978 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-14 04:16:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:16:27,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2024-11-14 04:16:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:27,979 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:16:27,980 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:16:27,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:27,981 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:27,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:16:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 04:16:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 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) [2024-11-14 04:16:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-14 04:16:27,987 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2024-11-14 04:16:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:27,987 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-14 04:16:27,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-14 04:16:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:16:27,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:27,987 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:27,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:16:27,988 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:27,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1259583233, now seen corresponding path program 1 times [2024-11-14 04:16:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:27,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046587764] [2024-11-14 04:16:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:28,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046587764] [2024-11-14 04:16:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046587764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:28,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:16:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286464216] [2024-11-14 04:16:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:28,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:16:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:16:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:16:28,289 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:28,417 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-14 04:16:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:16:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2024-11-14 04:16:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:28,418 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:16:28,419 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:16:28,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:16:28,419 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:28,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:16:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2024-11-14 04:16:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 04:16:28,425 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2024-11-14 04:16:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:28,425 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 04:16:28,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 04:16:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:16:28,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:28,427 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:28,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 04:16:28,427 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:28,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 392406983, now seen corresponding path program 1 times [2024-11-14 04:16:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:28,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215457052] [2024-11-14 04:16:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:28,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215457052] [2024-11-14 04:16:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215457052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:28,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:16:28,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130495561] [2024-11-14 04:16:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:28,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:16:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:16:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:16:28,821 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:28,955 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-14 04:16:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:16:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 11 [2024-11-14 04:16:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:28,958 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:16:28,958 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 04:16:28,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:16:28,959 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:28,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 04:16:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-11-14 04:16:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-14 04:16:28,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 11 [2024-11-14 04:16:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:28,965 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-14 04:16:28,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-14 04:16:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:16:28,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:28,966 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:28,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 04:16:28,966 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:28,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -721276145, now seen corresponding path program 1 times [2024-11-14 04:16:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:28,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207989874] [2024-11-14 04:16:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:29,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207989874] [2024-11-14 04:16:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207989874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:29,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:16:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106717796] [2024-11-14 04:16:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:29,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:16:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:16:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:29,192 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:29,240 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-14 04:16:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:16:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2024-11-14 04:16:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:29,241 INFO L225 Difference]: With dead ends: 36 [2024-11-14 04:16:29,241 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 04:16:29,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:16:29,242 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:29,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:16:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 04:16:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 04:16:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 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) [2024-11-14 04:16:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-14 04:16:29,249 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2024-11-14 04:16:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:29,249 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-14 04:16:29,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-14 04:16:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 04:16:29,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:29,250 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:29,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 04:16:29,250 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:29,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -388779279, now seen corresponding path program 1 times [2024-11-14 04:16:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744686962] [2024-11-14 04:16:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:29,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744686962] [2024-11-14 04:16:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744686962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522915250] [2024-11-14 04:16:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:29,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:29,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:16:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:29,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 04:16:29,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:29,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:29,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:16:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:16:29,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522915250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:29,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066613929] [2024-11-14 04:16:29,879 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:16:29,879 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:29,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:29,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:29,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:30,612 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2066613929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:31,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:31,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6, 6] total 21 [2024-11-14 04:16:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96867850] [2024-11-14 04:16:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:31,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:16:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:16:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:16:31,760 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:32,113 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-14 04:16:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:16:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 13 [2024-11-14 04:16:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:32,114 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:16:32,114 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:16:32,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:16:32,115 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:32,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:16:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:16:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-14 04:16:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 23 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) [2024-11-14 04:16:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-14 04:16:32,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2024-11-14 04:16:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:32,121 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-14 04:16:32,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-14 04:16:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:16:32,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:32,122 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:32,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:32,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:16:32,323 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:32,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1448562296, now seen corresponding path program 1 times [2024-11-14 04:16:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411439104] [2024-11-14 04:16:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:32,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411439104] [2024-11-14 04:16:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411439104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814006165] [2024-11-14 04:16:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:32,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:32,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:16:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:32,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 04:16:32,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:32,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:32,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:16:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814006165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001160502] [2024-11-14 04:16:32,913 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:16:32,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:32,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:32,913 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:32,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:35,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:40,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1414#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_31| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_33| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_22| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_22|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_22|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_22|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_31|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_33|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_31|)))' at error location [2024-11-14 04:16:40,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:40,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-14 04:16:40,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080334058] [2024-11-14 04:16:40,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:40,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:16:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:16:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=530, Unknown=1, NotChecked=0, Total=600 [2024-11-14 04:16:40,033 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2024-11-14 04:16:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:40,253 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-14 04:16:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:16:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 15 [2024-11-14 04:16:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:40,254 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:16:40,254 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:16:40,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=87, Invalid=668, Unknown=1, NotChecked=0, Total=756 [2024-11-14 04:16:40,255 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:40,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:16:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-11-14 04:16:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 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) [2024-11-14 04:16:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-14 04:16:40,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2024-11-14 04:16:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:40,258 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-14 04:16:40,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2024-11-14 04:16:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-14 04:16:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 04:16:40,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:40,259 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:40,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:40,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:40,463 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:40,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1955759582, now seen corresponding path program 1 times [2024-11-14 04:16:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708145772] [2024-11-14 04:16:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:40,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708145772] [2024-11-14 04:16:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708145772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:40,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727879075] [2024-11-14 04:16:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:40,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:40,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:40,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:40,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:16:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:40,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:16:40,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:40,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:40,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:16:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:41,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727879075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:41,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699549215] [2024-11-14 04:16:41,016 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:16:41,016 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:41,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:41,017 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:41,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:42,641 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:44,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1593#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_35| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_35| Int)) (and (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_35| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_35|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_35|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_29| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_30| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_30| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_29|)) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_35|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_29|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_30|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_29|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_30|) 0)))) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_35| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:16:44,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:44,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:44,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-14 04:16:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185774321] [2024-11-14 04:16:44,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:44,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:16:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:16:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:16:44,703 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 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) [2024-11-14 04:16:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:44,887 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-14 04:16:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:16:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 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 16 [2024-11-14 04:16:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:44,889 INFO L225 Difference]: With dead ends: 28 [2024-11-14 04:16:44,889 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:16:44,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:16:44,891 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:44,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:16:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-14 04:16:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 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) [2024-11-14 04:16:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-14 04:16:44,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2024-11-14 04:16:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:44,894 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-14 04:16:44,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 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) [2024-11-14 04:16:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-14 04:16:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:16:44,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:44,897 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:44,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:45,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:45,101 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:45,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1710717057, now seen corresponding path program 1 times [2024-11-14 04:16:45,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:45,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785496012] [2024-11-14 04:16:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:45,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785496012] [2024-11-14 04:16:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785496012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652784352] [2024-11-14 04:16:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:45,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:16:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:16:45,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:45,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:45,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:16:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652784352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348010654] [2024-11-14 04:16:45,754 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:16:45,754 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:45,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:45,754 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:45,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:47,102 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:48,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1779#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_40| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_38| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_38|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_40|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_40|)))' at error location [2024-11-14 04:16:48,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:48,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-14 04:16:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348425303] [2024-11-14 04:16:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:48,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:16:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:16:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:16:48,837 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:49,132 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-11-14 04:16:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:16:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 18 [2024-11-14 04:16:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:49,135 INFO L225 Difference]: With dead ends: 29 [2024-11-14 04:16:49,135 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:16:49,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:16:49,136 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:49,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:16:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-14 04:16:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 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) [2024-11-14 04:16:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-14 04:16:49,140 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2024-11-14 04:16:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:49,140 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-14 04:16:49,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-14 04:16:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:16:49,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:49,141 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:49,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:16:49,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:49,342 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:49,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1492622244, now seen corresponding path program 1 times [2024-11-14 04:16:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:49,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344818473] [2024-11-14 04:16:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:49,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:49,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344818473] [2024-11-14 04:16:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344818473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:49,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931237316] [2024-11-14 04:16:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:49,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:49,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:16:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:49,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:16:49,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:49,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:50,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:16:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:50,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931237316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:50,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122884526] [2024-11-14 04:16:50,171 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:16:50,171 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:50,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:50,172 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:50,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:52,314 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2122884526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:55,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 8, 8] total 29 [2024-11-14 04:16:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785024463] [2024-11-14 04:16:55,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:55,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:16:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:16:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:16:55,442 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:56,098 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-11-14 04:16:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:16:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 04:16:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:56,100 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:16:56,100 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 04:16:56,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:16:56,102 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:56,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:16:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 04:16:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 04:16:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 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) [2024-11-14 04:16:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-14 04:16:56,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2024-11-14 04:16:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:56,107 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-14 04:16:56,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:16:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-14 04:16:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 04:16:56,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:56,110 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:56,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:56,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 04:16:56,311 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:16:56,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 973383116, now seen corresponding path program 2 times [2024-11-14 04:16:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90150970] [2024-11-14 04:16:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:56,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:56,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90150970] [2024-11-14 04:16:56,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90150970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:56,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558757398] [2024-11-14 04:16:56,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:16:56,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:56,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:56,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:16:57,096 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:16:57,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:57,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 04:16:57,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:57,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:16:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:57,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:57,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:57,774 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 99 treesize of output 99 [2024-11-14 04:16:57,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:16:57,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:57,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:16:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:16:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558757398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867529931] [2024-11-14 04:16:58,051 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:16:58,052 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:58,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:58,052 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:58,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:59,613 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:02,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2184#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_63| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_61| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_63|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_61|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_57| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_55| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_55|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_57|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_57| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_55|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_55|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_61|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_57|)))))' at error location [2024-11-14 04:17:02,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:02,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:02,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2024-11-14 04:17:02,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114008216] [2024-11-14 04:17:02,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:02,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 04:17:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 04:17:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 04:17:02,020 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:02,904 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-11-14 04:17:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 04:17:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 04:17:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:02,905 INFO L225 Difference]: With dead ends: 67 [2024-11-14 04:17:02,905 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:17:02,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=268, Invalid=3038, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:17:02,906 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:02,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:17:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 04:17:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.16) internal successors, (29), 26 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) [2024-11-14 04:17:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-14 04:17:02,909 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2024-11-14 04:17:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:02,909 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-14 04:17:02,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-14 04:17:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:17:02,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:02,910 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:02,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:17:03,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 04:17:03,111 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:03,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 249268987, now seen corresponding path program 3 times [2024-11-14 04:17:03,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:03,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423740859] [2024-11-14 04:17:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:03,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423740859] [2024-11-14 04:17:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423740859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982884294] [2024-11-14 04:17:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:17:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:03,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:17:03,618 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:17:03,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:03,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:17:03,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:03,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:04,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:17:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982884294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:04,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300856712] [2024-11-14 04:17:04,109 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:04,109 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:04,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:04,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:04,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:05,601 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:07,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2477#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_73| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_71| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_67| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_64| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_71|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_67|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_64|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_67|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_64|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_67| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_64|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_73|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_71|)))' at error location [2024-11-14 04:17:07,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:07,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-14 04:17:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270150473] [2024-11-14 04:17:07,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:07,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:17:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:17:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 04:17:07,698 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:08,066 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-14 04:17:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:17:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 [2024-11-14 04:17:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:08,067 INFO L225 Difference]: With dead ends: 34 [2024-11-14 04:17:08,067 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 04:17:08,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 04:17:08,068 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:08,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 04:17:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-11-14 04:17:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-14 04:17:08,072 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2024-11-14 04:17:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:08,072 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-14 04:17:08,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-14 04:17:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:17:08,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:08,073 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:08,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:08,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 04:17:08,277 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:08,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -862594629, now seen corresponding path program 2 times [2024-11-14 04:17:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:08,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564974887] [2024-11-14 04:17:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:08,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564974887] [2024-11-14 04:17:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564974887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893228077] [2024-11-14 04:17:08,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:08,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:08,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:08,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:17:08,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:17:08,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:08,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 04:17:08,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:09,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:09,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:17:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893228077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975977206] [2024-11-14 04:17:09,480 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:09,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:09,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:09,481 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:09,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:11,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:13,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2726#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_89| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_88| Int)) (and (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_89| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_88| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_88|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_89|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_76| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_73| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_73|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_76|) 0)) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_76| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_73|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_73|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_89|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_76|))) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:17:13,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:13,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-14 04:17:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36540591] [2024-11-14 04:17:13,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:13,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:17:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:17:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:17:13,066 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:13,377 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-14 04:17:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:17:13,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 04:17:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:13,378 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:17:13,378 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:17:13,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:17:13,380 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:13,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:17:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 04:17:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-11-14 04:17:13,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2024-11-14 04:17:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:13,383 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-11-14 04:17:13,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-11-14 04:17:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 04:17:13,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:13,384 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:13,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:17:13,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 04:17:13,584 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:13,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1985004329, now seen corresponding path program 4 times [2024-11-14 04:17:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615745553] [2024-11-14 04:17:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:14,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:14,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615745553] [2024-11-14 04:17:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615745553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584842761] [2024-11-14 04:17:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:17:14,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:14,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:14,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:14,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:17:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:14,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 04:17:14,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:14,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:17:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:14,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:17,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:17,326 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 99 treesize of output 99 [2024-11-14 04:17:17,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:17:17,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:17,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:17:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584842761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346821215] [2024-11-14 04:17:17,480 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:17,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:17,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:17,481 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:17,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:18,977 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:25,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3008#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_87| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_90| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_87| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_84| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_87|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_84|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_87|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_87| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_84|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_84|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_87|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_90|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_87|)))' at error location [2024-11-14 04:17:25,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:25,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:25,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 16] total 32 [2024-11-14 04:17:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395015210] [2024-11-14 04:17:25,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:25,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 04:17:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 04:17:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1775, Unknown=3, NotChecked=0, Total=1892 [2024-11-14 04:17:25,807 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:27,127 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-11-14 04:17:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:17:27,127 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 04:17:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:27,128 INFO L225 Difference]: With dead ends: 93 [2024-11-14 04:17:27,128 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 04:17:27,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=220, Invalid=3437, Unknown=3, NotChecked=0, Total=3660 [2024-11-14 04:17:27,129 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:27,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:17:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 04:17:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-14 04:17:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-14 04:17:27,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2024-11-14 04:17:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:27,134 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-14 04:17:27,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-14 04:17:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:17:27,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:27,135 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:27,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:27,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:17:27,336 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:27,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 124900890, now seen corresponding path program 5 times [2024-11-14 04:17:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304135740] [2024-11-14 04:17:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:27,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304135740] [2024-11-14 04:17:27,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304135740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28609292] [2024-11-14 04:17:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:27,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:27,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:17:27,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:17:27,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:27,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:17:27,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:28,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:28,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 04:17:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28609292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559382798] [2024-11-14 04:17:28,694 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:28,694 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:28,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:28,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:28,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:29,790 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:31,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3402#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_102| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_99| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_102|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_99|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_99| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_95| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_99| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_95|)) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_95|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_99|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_99|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_99|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_95|) 1)))))' at error location [2024-11-14 04:17:31,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:31,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:31,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2024-11-14 04:17:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990205337] [2024-11-14 04:17:31,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:31,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:17:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:17:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:17:31,522 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:31,951 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2024-11-14 04:17:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:17:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 04:17:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:31,952 INFO L225 Difference]: With dead ends: 43 [2024-11-14 04:17:31,952 INFO L226 Difference]: Without dead ends: 43 [2024-11-14 04:17:31,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:17:31,954 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:31,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 64 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-14 04:17:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2024-11-14 04:17:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-11-14 04:17:31,956 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2024-11-14 04:17:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:31,956 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-11-14 04:17:31,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-11-14 04:17:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:17:31,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:31,957 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:31,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:17:32,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:17:32,158 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:32,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash -423038340, now seen corresponding path program 3 times [2024-11-14 04:17:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:32,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453858765] [2024-11-14 04:17:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:32,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:32,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453858765] [2024-11-14 04:17:32,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453858765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:32,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942207662] [2024-11-14 04:17:32,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:17:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:32,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:32,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:17:32,720 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:17:32,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:32,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 04:17:32,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:32,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:33,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:17:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:33,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942207662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836970552] [2024-11-14 04:17:33,295 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:33,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:33,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:33,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:33,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:34,793 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:36,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3732#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_126| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_127| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_106| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_110| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_127|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_110| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_106|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_106|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_110|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_106|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_110|) 0)))) (= |ULTIMATE.start_cstrcmp_~s2#1.offset| (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_127| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_126|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_127|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_126| |ULTIMATE.start_cstrcmp_~s2#1.base|)))' at error location [2024-11-14 04:17:36,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:36,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-14 04:17:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077831477] [2024-11-14 04:17:36,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:36,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:17:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:17:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 04:17:36,916 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:37,389 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-11-14 04:17:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:17:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:17:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:37,391 INFO L225 Difference]: With dead ends: 41 [2024-11-14 04:17:37,391 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 04:17:37,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:17:37,392 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:37,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 173 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 04:17:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-14 04:17:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-11-14 04:17:37,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2024-11-14 04:17:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:37,398 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-11-14 04:17:37,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-11-14 04:17:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 04:17:37,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:37,400 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:37,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:17:37,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:17:37,604 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:37,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1680370838, now seen corresponding path program 6 times [2024-11-14 04:17:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:37,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760219135] [2024-11-14 04:17:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:38,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760219135] [2024-11-14 04:17:38,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760219135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672191936] [2024-11-14 04:17:38,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:17:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:38,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:38,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:17:38,637 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:17:38,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:38,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 04:17:38,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:39,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:17:39,292 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:17:39,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 04:17:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:39,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:39,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-14 04:17:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672191936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:40,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842947441] [2024-11-14 04:17:40,192 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:40,192 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:40,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:40,193 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:40,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:41,400 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:43,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4098#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_123| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_120| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_123|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_120|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_124| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_120| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_124| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_120|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_120|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_124|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_124|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_120|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_120|) 1)))))' at error location [2024-11-14 04:17:43,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:43,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:43,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 16] total 41 [2024-11-14 04:17:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093121066] [2024-11-14 04:17:43,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:43,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 04:17:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 04:17:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2683, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 04:17:43,943 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:44,989 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2024-11-14 04:17:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:17:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-14 04:17:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:44,990 INFO L225 Difference]: With dead ends: 78 [2024-11-14 04:17:44,990 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 04:17:44,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=294, Invalid=4398, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:17:44,992 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:44,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:17:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 04:17:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-14 04:17:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-14 04:17:45,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2024-11-14 04:17:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:45,002 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-14 04:17:45,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-14 04:17:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 04:17:45,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:45,003 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:45,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:17:45,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 04:17:45,204 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:45,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -503063040, now seen corresponding path program 7 times [2024-11-14 04:17:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:45,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599025832] [2024-11-14 04:17:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:45,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599025832] [2024-11-14 04:17:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599025832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:45,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241988202] [2024-11-14 04:17:45,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:17:45,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:45,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:45,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:17:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:45,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:17:45,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:45,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:46,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:17:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 04:17:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241988202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814302609] [2024-11-14 04:17:46,202 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:46,202 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:46,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:46,202 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:46,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:47,283 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:52,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4517#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_134| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_137| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_133| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_138| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_138| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_133|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_134|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_138|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_133|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_133|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_138|) 0)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_137|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_134|)))' at error location [2024-11-14 04:17:52,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:17:52,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-14 04:17:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235372964] [2024-11-14 04:17:52,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:17:52,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 04:17:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 04:17:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1022, Unknown=1, NotChecked=0, Total=1122 [2024-11-14 04:17:52,545 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:53,009 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2024-11-14 04:17:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 04:17:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 04:17:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:53,010 INFO L225 Difference]: With dead ends: 50 [2024-11-14 04:17:53,010 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 04:17:53,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=125, Invalid=1206, Unknown=1, NotChecked=0, Total=1332 [2024-11-14 04:17:53,012 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:53,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:17:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 04:17:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-11-14 04:17:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-11-14 04:17:53,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2024-11-14 04:17:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:53,016 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-11-14 04:17:53,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-11-14 04:17:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:17:53,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:53,018 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:53,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:17:53,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:53,219 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:17:53,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1584916310, now seen corresponding path program 4 times [2024-11-14 04:17:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:53,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608963034] [2024-11-14 04:17:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:54,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608963034] [2024-11-14 04:17:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608963034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34995908] [2024-11-14 04:17:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:17:54,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:54,711 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:54,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:17:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:54,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 04:17:54,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:55,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:17:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:17:55,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:57,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:57,965 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 99 treesize of output 99 [2024-11-14 04:17:57,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:17:58,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:17:58,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:17:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:17:58,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34995908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459422058] [2024-11-14 04:17:58,129 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:17:58,129 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:58,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:58,129 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:58,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:59,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:02,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4915#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_170| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_171| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_151| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_146| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_171|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_151| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_146|)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_151|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_146|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_151|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_146|) 1))) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_170| |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_171| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_170|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_171|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:18:02,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:02,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 19] total 43 [2024-11-14 04:18:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63653419] [2024-11-14 04:18:02,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:02,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 04:18:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 04:18:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2795, Unknown=1, NotChecked=0, Total=2970 [2024-11-14 04:18:02,103 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:03,245 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2024-11-14 04:18:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:18:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-14 04:18:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:03,246 INFO L225 Difference]: With dead ends: 73 [2024-11-14 04:18:03,246 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 04:18:03,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=224, Invalid=3557, Unknown=1, NotChecked=0, Total=3782 [2024-11-14 04:18:03,247 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:03,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 126 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:18:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 04:18:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-11-14 04:18:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-11-14 04:18:03,250 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2024-11-14 04:18:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:03,250 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-11-14 04:18:03,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-11-14 04:18:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:18:03,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:03,251 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:03,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:18:03,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:03,452 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:03,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2000489501, now seen corresponding path program 5 times [2024-11-14 04:18:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388217785] [2024-11-14 04:18:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:04,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388217785] [2024-11-14 04:18:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388217785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640550338] [2024-11-14 04:18:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:04,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:04,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:04,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:04,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:18:04,336 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:18:04,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:04,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 04:18:04,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:05,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:05,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:18:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640550338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465007349] [2024-11-14 04:18:05,686 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:18:05,686 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:05,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:05,687 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:05,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:06,860 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:09,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5359#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_188| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_186| Int)) (and (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_188| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_186| |ULTIMATE.start_cstrcmp_~s2#1.base|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_164| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_159| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_159|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_188|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_164|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_159|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_164|) 0)) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_164| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_159|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_186|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_188|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:18:09,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:09,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:09,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 13] total 43 [2024-11-14 04:18:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069738232] [2024-11-14 04:18:09,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:09,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:18:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:18:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2862, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 04:18:09,620 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:11,105 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2024-11-14 04:18:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:18:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-14 04:18:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:11,107 INFO L225 Difference]: With dead ends: 86 [2024-11-14 04:18:11,107 INFO L226 Difference]: Without dead ends: 86 [2024-11-14 04:18:11,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=381, Invalid=4731, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 04:18:11,109 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:11,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 208 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:18:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-14 04:18:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 50. [2024-11-14 04:18:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-11-14 04:18:11,115 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2024-11-14 04:18:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:11,115 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-11-14 04:18:11,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-11-14 04:18:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:18:11,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:11,116 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:11,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:11,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 04:18:11,317 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:11,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash 997454987, now seen corresponding path program 8 times [2024-11-14 04:18:11,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:11,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469975578] [2024-11-14 04:18:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:12,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469975578] [2024-11-14 04:18:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469975578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75883193] [2024-11-14 04:18:12,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:12,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:12,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:18:12,500 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:18:12,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:12,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 04:18:12,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:12,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:18:12,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:18:12,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 04:18:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:12,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:12,951 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_674 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_674) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 04:18:12,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:12,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 04:18:12,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:12,966 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 37 treesize of output 32 [2024-11-14 04:18:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75883193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832617907] [2024-11-14 04:18:13,125 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:18:13,125 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:13,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:13,126 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:13,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:13,964 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:16,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5844#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_172| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_168| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_175| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_180| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_180| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_175|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_175|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_180|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_175|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_180|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_168|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_172|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_168|)))' at error location [2024-11-14 04:18:16,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:16,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:16,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2024-11-14 04:18:16,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387155502] [2024-11-14 04:18:16,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:16,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:18:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:16,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:18:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1454, Unknown=1, NotChecked=76, Total=1640 [2024-11-14 04:18:16,341 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:17,083 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2024-11-14 04:18:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:18:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 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 47 [2024-11-14 04:18:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:17,088 INFO L225 Difference]: With dead ends: 89 [2024-11-14 04:18:17,088 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 04:18:17,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=134, Invalid=1761, Unknown=1, NotChecked=84, Total=1980 [2024-11-14 04:18:17,089 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:17,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 138 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 711 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2024-11-14 04:18:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 04:18:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-14 04:18:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-14 04:18:17,092 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2024-11-14 04:18:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:17,092 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-14 04:18:17,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-14 04:18:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 04:18:17,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:17,092 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:17,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:18:17,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 04:18:17,293 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:17,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2071776587, now seen corresponding path program 9 times [2024-11-14 04:18:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:17,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162068753] [2024-11-14 04:18:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:18:17,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162068753] [2024-11-14 04:18:17,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162068753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:17,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696401757] [2024-11-14 04:18:17,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:18:17,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:17,821 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:17,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:18:18,139 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:18:18,140 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:18,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-14 04:18:18,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:18,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:18:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:19,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:20,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:20,108 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 99 treesize of output 99 [2024-11-14 04:18:20,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:18:20,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:20,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:18:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:20,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696401757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:20,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540572067] [2024-11-14 04:18:20,588 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:18:20,588 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:20,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:20,589 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:20,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:22,132 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:25,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6350#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_186| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_182| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_186|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_182|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_190| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_195| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_195|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_190|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_195|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_190|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_195| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_190|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_182|)))))' at error location [2024-11-14 04:18:25,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:25,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 56 [2024-11-14 04:18:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715753293] [2024-11-14 04:18:25,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:25,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 04:18:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 04:18:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4355, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 04:18:25,718 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:29,210 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2024-11-14 04:18:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 04:18:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-14 04:18:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:29,211 INFO L225 Difference]: With dead ends: 89 [2024-11-14 04:18:29,211 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 04:18:29,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=449, Invalid=9853, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:18:29,214 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:29,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 198 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 04:18:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 04:18:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-11-14 04:18:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2024-11-14 04:18:29,218 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2024-11-14 04:18:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:29,219 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2024-11-14 04:18:29,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2024-11-14 04:18:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 04:18:29,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:29,219 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:29,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:18:29,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 04:18:29,420 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:29,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 298973466, now seen corresponding path program 6 times [2024-11-14 04:18:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377739821] [2024-11-14 04:18:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:30,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377739821] [2024-11-14 04:18:30,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377739821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945867495] [2024-11-14 04:18:30,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:18:30,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:30,083 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:30,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:18:30,274 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:18:30,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:30,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 04:18:30,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:30,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:18:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:30,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945867495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322373880] [2024-11-14 04:18:31,187 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:18:31,187 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:31,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:31,188 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:31,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:32,294 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:34,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6921#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_236| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_238| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_236|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_238|) (= |ULTIMATE.start_cstrcmp_~s2#1.offset| (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_238| 1)) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_236| |ULTIMATE.start_cstrcmp_~s2#1.base|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_205| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_210| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_210|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_210| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_205|)) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_238|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_205|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_205|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_210|) 0)))) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:18:34,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:34,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:34,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2024-11-14 04:18:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628012633] [2024-11-14 04:18:34,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:34,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:18:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:18:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 04:18:34,312 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:34,880 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-14 04:18:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:18:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-14 04:18:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:34,881 INFO L225 Difference]: With dead ends: 59 [2024-11-14 04:18:34,881 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 04:18:34,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=275, Invalid=2917, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 04:18:34,882 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:34,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 04:18:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-14 04:18:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-11-14 04:18:34,884 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2024-11-14 04:18:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:34,884 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-11-14 04:18:34,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-11-14 04:18:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 04:18:34,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:34,885 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:34,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:18:35,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 04:18:35,086 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:35,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2006981384, now seen corresponding path program 10 times [2024-11-14 04:18:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:35,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932582210] [2024-11-14 04:18:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:37,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932582210] [2024-11-14 04:18:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932582210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879531072] [2024-11-14 04:18:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:18:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:37,497 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:37,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:18:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:37,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 04:18:37,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:38,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:18:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:38,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:41,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:41,876 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 99 treesize of output 99 [2024-11-14 04:18:41,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:18:41,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:41,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:18:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:18:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879531072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:42,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501129022] [2024-11-14 04:18:42,106 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:18:42,106 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:42,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:42,106 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:42,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:43,154 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:47,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7451#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_212| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_207| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_222| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_227| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_222|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_227|) 0)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_207|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_222|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_227|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_227| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_222|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_212|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_207|)))' at error location [2024-11-14 04:18:47,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:47,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:47,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 25] total 56 [2024-11-14 04:18:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031085636] [2024-11-14 04:18:47,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:47,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 04:18:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 04:18:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4380, Unknown=1, NotChecked=0, Total=4556 [2024-11-14 04:18:47,463 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:51,650 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2024-11-14 04:18:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 04:18:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 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 56 [2024-11-14 04:18:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:51,652 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:18:51,652 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 04:18:51,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=307, Invalid=7702, Unknown=1, NotChecked=0, Total=8010 [2024-11-14 04:18:51,653 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:51,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 412 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 04:18:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 04:18:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2024-11-14 04:18:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2024-11-14 04:18:51,656 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2024-11-14 04:18:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:51,656 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2024-11-14 04:18:51,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2024-11-14 04:18:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:18:51,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:51,657 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:51,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:18:51,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 04:18:51,858 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:18:51,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -736107487, now seen corresponding path program 11 times [2024-11-14 04:18:51,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:51,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409152497] [2024-11-14 04:18:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:53,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409152497] [2024-11-14 04:18:53,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409152497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:18:53,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342801188] [2024-11-14 04:18:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:18:53,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:53,208 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:18:53,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:18:53,738 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 04:18:53,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:18:53,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-14 04:18:53,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:53,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:18:53,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:18:53,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:18:54,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:18:54,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:18:54,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-14 04:18:56,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:56,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2024-11-14 04:18:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:56,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:58,330 INFO L349 Elim1Store]: treesize reduction 22, result has 68.1 percent of original size [2024-11-14 04:18:58,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 166 [2024-11-14 04:18:58,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:58,363 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 256 treesize of output 254 [2024-11-14 04:18:58,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-14 04:18:58,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-11-14 04:18:58,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:58,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 106 [2024-11-14 04:18:58,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:18:58,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 210 [2024-11-14 04:19:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 41 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342801188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811347120] [2024-11-14 04:19:01,963 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:01,963 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:01,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:01,964 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:01,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:02,943 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:07,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8109#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_225| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_230| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_245| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_240| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_225|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_240|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_245| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_240|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_240|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_245|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_245|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_230|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_225|)))' at error location [2024-11-14 04:19:07,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:07,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:07,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 31] total 83 [2024-11-14 04:19:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962432324] [2024-11-14 04:19:07,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:07,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-14 04:19:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-14 04:19:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=8497, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 04:19:07,084 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:11,383 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2024-11-14 04:19:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 04:19:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 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 58 [2024-11-14 04:19:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:11,384 INFO L225 Difference]: With dead ends: 118 [2024-11-14 04:19:11,384 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 04:19:11,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=919, Invalid=12653, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 04:19:11,386 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:11,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 150 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:19:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 04:19:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-11-14 04:19:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2024-11-14 04:19:11,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2024-11-14 04:19:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:11,394 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2024-11-14 04:19:11,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2024-11-14 04:19:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 04:19:11,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:11,395 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:11,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:11,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 04:19:11,595 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:11,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1216482177, now seen corresponding path program 7 times [2024-11-14 04:19:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:11,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607164521] [2024-11-14 04:19:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:11,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:12,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607164521] [2024-11-14 04:19:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607164521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353262512] [2024-11-14 04:19:12,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:19:12,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:12,497 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:12,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 04:19:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:12,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 04:19:12,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:13,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:13,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:19:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353262512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720413462] [2024-11-14 04:19:13,605 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:13,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:13,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:13,606 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:13,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:14,391 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:16,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8744#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_296| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_293| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_293| |ULTIMATE.start_cstrcmp_~s2#1.base|) (= |ULTIMATE.start_cstrcmp_~s2#1.offset| (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_296| 1)) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_262| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_257| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_257|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_296|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_262| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_257|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_257|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_262|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_262|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_293|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_296|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:19:16,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:16,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:16,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 35 [2024-11-14 04:19:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268030766] [2024-11-14 04:19:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:16,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 04:19:16,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 04:19:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:19:16,195 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 36 states, 35 states have (on average 3.0) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:16,918 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2024-11-14 04:19:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:19:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.0) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-14 04:19:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:16,919 INFO L225 Difference]: With dead ends: 68 [2024-11-14 04:19:16,919 INFO L226 Difference]: Without dead ends: 68 [2024-11-14 04:19:16,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 04:19:16,920 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:16,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 197 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:19:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-14 04:19:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-14 04:19:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-11-14 04:19:16,923 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2024-11-14 04:19:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:16,923 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-11-14 04:19:16,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.0) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-11-14 04:19:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 04:19:16,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:16,924 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:16,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 04:19:17,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 04:19:17,125 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:17,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash 644209645, now seen corresponding path program 12 times [2024-11-14 04:19:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:17,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168559374] [2024-11-14 04:19:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:17,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168559374] [2024-11-14 04:19:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168559374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172283568] [2024-11-14 04:19:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:19:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:17,988 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:17,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 04:19:18,225 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:19:18,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:18,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-14 04:19:18,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:18,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:19:18,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:19:18,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:19:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:18,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:19,051 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1043 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 04:19:19,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:19,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 04:19:19,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:19,065 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 37 treesize of output 32 [2024-11-14 04:19:19,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:19:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172283568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529089532] [2024-11-14 04:19:19,446 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:19,446 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:19,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:19,446 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:19,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:20,287 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:25,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9335#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_261| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_255| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_282| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_277| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_277|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_282|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_277|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_255|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_282| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_277|)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_282|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_261|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_255|)))' at error location [2024-11-14 04:19:25,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:25,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:25,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 20] total 46 [2024-11-14 04:19:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903786710] [2024-11-14 04:19:25,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:25,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 04:19:25,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 04:19:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3130, Unknown=2, NotChecked=112, Total=3422 [2024-11-14 04:19:25,225 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 47 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 46 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:26,392 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2024-11-14 04:19:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 04:19:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 46 states have internal predecessors, (126), 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 65 [2024-11-14 04:19:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:26,393 INFO L225 Difference]: With dead ends: 122 [2024-11-14 04:19:26,393 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:19:26,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=203, Invalid=3705, Unknown=2, NotChecked=122, Total=4032 [2024-11-14 04:19:26,394 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:26,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 184 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1466 Invalid, 0 Unknown, 75 Unchecked, 0.9s Time] [2024-11-14 04:19:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:19:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-14 04:19:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-14 04:19:26,397 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2024-11-14 04:19:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:26,397 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-14 04:19:26,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 46 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-14 04:19:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 04:19:26,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:26,402 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:26,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 04:19:26,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 04:19:26,603 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:26,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -346709097, now seen corresponding path program 13 times [2024-11-14 04:19:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:26,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543086495] [2024-11-14 04:19:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:27,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:27,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543086495] [2024-11-14 04:19:27,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543086495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:27,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755969278] [2024-11-14 04:19:27,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:19:27,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:27,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:27,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 04:19:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:27,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 04:19:27,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:27,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:28,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:19:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:19:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755969278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093317305] [2024-11-14 04:19:28,437 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:28,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:28,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:28,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:28,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:29,576 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:32,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9977#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_280| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_274| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_295| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_301| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_295|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_301|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_295|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_301|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_274|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_301| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_295|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_280|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_274|)))' at error location [2024-11-14 04:19:32,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:32,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2024-11-14 04:19:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189381373] [2024-11-14 04:19:32,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:32,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:19:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:19:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:19:32,270 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:33,322 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2024-11-14 04:19:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:19:33,323 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 67 [2024-11-14 04:19:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:33,324 INFO L225 Difference]: With dead ends: 77 [2024-11-14 04:19:33,324 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 04:19:33,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:19:33,325 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:33,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:19:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 04:19:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2024-11-14 04:19:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-11-14 04:19:33,328 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2024-11-14 04:19:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:33,328 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-11-14 04:19:33,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-11-14 04:19:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 04:19:33,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:33,329 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:33,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 04:19:33,533 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:33,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2136921247, now seen corresponding path program 8 times [2024-11-14 04:19:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79182767] [2024-11-14 04:19:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 14 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:36,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79182767] [2024-11-14 04:19:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79182767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543171787] [2024-11-14 04:19:36,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:19:36,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:36,348 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:36,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 04:19:37,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:19:37,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:37,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-14 04:19:37,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:37,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:19:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:19:38,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:40,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:40,208 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 99 treesize of output 99 [2024-11-14 04:19:40,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:19:40,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:19:40,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:19:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 14 proven. 141 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:19:40,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543171787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:40,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877706404] [2024-11-14 04:19:40,883 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:40,884 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:40,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:40,884 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:40,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:41,797 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:45,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10627#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_355| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_358| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_355| |ULTIMATE.start_cstrcmp_~s2#1.base|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_321| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_315| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_315|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_358|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_321|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_321| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_315|)) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_315|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_321|) 0)))) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_358| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_355|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_358|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:19:45,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:45,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 28] total 79 [2024-11-14 04:19:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892493863] [2024-11-14 04:19:45,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:45,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-14 04:19:45,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-14 04:19:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=7870, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 04:19:45,126 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:47,540 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2024-11-14 04:19:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:19:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 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 68 [2024-11-14 04:19:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:47,541 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:19:47,541 INFO L226 Difference]: Without dead ends: 78 [2024-11-14 04:19:47,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2732 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=374, Invalid=9132, Unknown=0, NotChecked=0, Total=9506 [2024-11-14 04:19:47,542 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:47,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 274 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:19:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-14 04:19:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2024-11-14 04:19:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2024-11-14 04:19:47,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2024-11-14 04:19:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:47,545 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2024-11-14 04:19:47,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2024-11-14 04:19:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 04:19:47,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:47,546 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:47,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 04:19:47,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:47,747 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:47,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash 849672632, now seen corresponding path program 9 times [2024-11-14 04:19:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198906161] [2024-11-14 04:19:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 25 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:19:48,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198906161] [2024-11-14 04:19:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198906161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883892005] [2024-11-14 04:19:48,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:19:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:48,845 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:48,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 04:19:49,193 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:19:49,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:49,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-14 04:19:49,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:19:49,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:50,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:19:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:19:50,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883892005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834585200] [2024-11-14 04:19:50,850 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:19:50,850 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:50,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:50,850 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:50,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:52,010 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:54,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11307#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_376| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_379| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_376| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_376|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_379|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_339| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_333| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_339|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_333|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_339|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_333|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_339| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_333|)) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_379|))) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_379| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)))' at error location [2024-11-14 04:19:54,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:54,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2024-11-14 04:19:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396501483] [2024-11-14 04:19:54,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:54,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:19:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:19:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3268, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:19:54,614 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:55,340 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2024-11-14 04:19:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:19:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-14 04:19:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:55,341 INFO L225 Difference]: With dead ends: 77 [2024-11-14 04:19:55,341 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 04:19:55,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=477, Invalid=4215, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:19:55,342 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:55,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 190 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:19:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 04:19:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-14 04:19:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2024-11-14 04:19:55,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 70 [2024-11-14 04:19:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:55,345 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2024-11-14 04:19:55,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2024-11-14 04:19:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:19:55,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:55,346 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:55,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 04:19:55,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:55,547 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:19:55,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -5923674, now seen corresponding path program 14 times [2024-11-14 04:19:55,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:55,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739478460] [2024-11-14 04:19:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 8 proven. 189 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:19:56,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739478460] [2024-11-14 04:19:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739478460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592074861] [2024-11-14 04:19:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:19:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:56,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:56,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 04:19:57,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 04:19:57,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:57,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-14 04:19:57,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:58,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:20:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 8 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:00,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:02,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:20:02,827 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 99 treesize of output 99 [2024-11-14 04:20:02,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:20:02,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:20:02,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:20:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 8 proven. 189 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 04:20:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592074861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133329232] [2024-11-14 04:20:03,756 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:20:03,756 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:03,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:03,757 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:03,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:04,881 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:09,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12013#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_324| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_324| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_324|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_324|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_361| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_355| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_324|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_355|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_361|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_355|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_361| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_355|)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_361|)))))' at error location [2024-11-14 04:20:09,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:09,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:09,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38, 31] total 86 [2024-11-14 04:20:09,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003600836] [2024-11-14 04:20:09,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:09,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 04:20:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:09,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 04:20:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9210, Unknown=0, NotChecked=0, Total=9506 [2024-11-14 04:20:09,339 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:15,105 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2024-11-14 04:20:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-14 04:20:15,106 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 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 74 [2024-11-14 04:20:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:15,107 INFO L225 Difference]: With dead ends: 224 [2024-11-14 04:20:15,107 INFO L226 Difference]: Without dead ends: 83 [2024-11-14 04:20:15,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=611, Invalid=19129, Unknown=0, NotChecked=0, Total=19740 [2024-11-14 04:20:15,109 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:15,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 463 Invalid, 3986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 04:20:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-14 04:20:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-14 04:20:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2024-11-14 04:20:15,112 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 74 [2024-11-14 04:20:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:15,112 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2024-11-14 04:20:15,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.244186046511628) internal successors, (193), 86 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2024-11-14 04:20:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 04:20:15,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:15,113 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:15,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 04:20:15,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:15,314 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:20:15,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1789752597, now seen corresponding path program 15 times [2024-11-14 04:20:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510684534] [2024-11-14 04:20:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:16,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:16,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510684534] [2024-11-14 04:20:16,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510684534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:16,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368598979] [2024-11-14 04:20:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:20:16,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:16,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:16,337 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:16,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 04:20:16,894 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:20:16,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:16,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 04:20:16,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:17,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:18,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:20:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368598979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082405150] [2024-11-14 04:20:18,787 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:20:18,788 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:18,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:18,788 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:18,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:19,929 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:22,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12930#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_346| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_346| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_382| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_376| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_382| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_376|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_376|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_382|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_382|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_376|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_346|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_346|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_346|)))' at error location [2024-11-14 04:20:22,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:22,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:22,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2024-11-14 04:20:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911860074] [2024-11-14 04:20:22,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:22,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 04:20:22,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 04:20:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=3647, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 04:20:22,979 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 52 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:23,857 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2024-11-14 04:20:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:20:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 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 78 [2024-11-14 04:20:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:23,858 INFO L225 Difference]: With dead ends: 88 [2024-11-14 04:20:23,858 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 04:20:23,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 04:20:23,860 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:23,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 187 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:20:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 04:20:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-11-14 04:20:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-14 04:20:23,863 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2024-11-14 04:20:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:23,863 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-14 04:20:23,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-14 04:20:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 04:20:23,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:23,864 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:23,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 04:20:24,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:24,066 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:20:24,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -352242975, now seen corresponding path program 10 times [2024-11-14 04:20:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264295255] [2024-11-14 04:20:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 36 proven. 184 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:25,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:25,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264295255] [2024-11-14 04:20:25,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264295255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:25,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490027090] [2024-11-14 04:20:25,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:20:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:25,260 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:25,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 04:20:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:25,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 04:20:25,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:26,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:26,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:20:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:26,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490027090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:26,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349318148] [2024-11-14 04:20:26,886 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:20:26,887 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:26,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:26,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:26,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:27,733 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:29,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13631#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_449| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_445| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_445| |ULTIMATE.start_cstrcmp_~s2#1.base|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_397| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_403| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_397|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_403|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_403|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_449|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_397|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_403| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_397|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_445|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_449|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_449| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:20:29,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2024-11-14 04:20:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604546625] [2024-11-14 04:20:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:29,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:20:29,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:20:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 04:20:29,976 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 44 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:31,117 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2024-11-14 04:20:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 04:20:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 44 states have internal predecessors, (133), 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 79 [2024-11-14 04:20:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:31,118 INFO L225 Difference]: With dead ends: 86 [2024-11-14 04:20:31,118 INFO L226 Difference]: Without dead ends: 86 [2024-11-14 04:20:31,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=333, Invalid=3699, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 04:20:31,119 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:31,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 354 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:20:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-14 04:20:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-14 04:20:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-11-14 04:20:31,123 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2024-11-14 04:20:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:31,123 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-11-14 04:20:31,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-11-14 04:20:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 04:20:31,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:31,124 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:31,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:31,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 04:20:31,325 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:20:31,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1333729615, now seen corresponding path program 16 times [2024-11-14 04:20:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77565597] [2024-11-14 04:20:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 9 proven. 244 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:32,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:32,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77565597] [2024-11-14 04:20:32,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77565597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:32,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495167573] [2024-11-14 04:20:32,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:20:32,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:32,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:32,766 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:32,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 04:20:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:33,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-11-14 04:20:33,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:33,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:20:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 9 proven. 244 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:34,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:37,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:20:37,936 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 99 treesize of output 99 [2024-11-14 04:20:37,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:20:37,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:20:37,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:20:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 9 proven. 244 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 04:20:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495167573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794991267] [2024-11-14 04:20:38,200 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:20:38,200 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:38,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:38,200 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:38,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:39,337 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:44,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14391#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_382| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_381| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_382|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_381|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_427| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_421| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_427| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_421|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_427|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_421|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_427|) 0)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_381|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_421|) 1)))))' at error location [2024-11-14 04:20:44,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:44,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 34] total 68 [2024-11-14 04:20:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879680377] [2024-11-14 04:20:44,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:44,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 04:20:44,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 04:20:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6109, Unknown=1, NotChecked=0, Total=6320 [2024-11-14 04:20:44,273 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 68 states, 68 states have (on average 2.676470588235294) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:50,384 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2024-11-14 04:20:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-14 04:20:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.676470588235294) internal successors, (182), 68 states have internal predecessors, (182), 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 83 [2024-11-14 04:20:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:50,386 INFO L225 Difference]: With dead ends: 249 [2024-11-14 04:20:50,386 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 04:20:50,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=496, Invalid=15505, Unknown=1, NotChecked=0, Total=16002 [2024-11-14 04:20:50,387 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 4198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:50,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 515 Invalid, 4198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-14 04:20:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 04:20:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-14 04:20:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2024-11-14 04:20:50,392 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2024-11-14 04:20:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:50,392 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2024-11-14 04:20:50,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.676470588235294) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2024-11-14 04:20:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 04:20:50,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:50,393 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:50,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 04:20:50,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:50,593 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:20:50,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1604374784, now seen corresponding path program 17 times [2024-11-14 04:20:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613443056] [2024-11-14 04:20:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:20:51,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613443056] [2024-11-14 04:20:51,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613443056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449976038] [2024-11-14 04:20:51,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:51,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:51,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 04:20:52,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 04:20:52,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:52,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 04:20:52,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:20:53,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:54,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 04:20:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:20:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449976038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952660180] [2024-11-14 04:20:54,673 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:20:54,673 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:54,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:54,673 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:54,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:55,806 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:58,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15410#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_406| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_405| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_406|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_405|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_451| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_444| Int)) (and (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_444|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_451|))) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_451| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_444|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_405|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_451|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_444|) 1)))))' at error location [2024-11-14 04:20:58,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:58,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2024-11-14 04:20:58,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786478432] [2024-11-14 04:20:58,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:58,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 04:20:58,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 04:20:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=4300, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 04:20:58,445 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 58 states, 57 states have (on average 3.3333333333333335) internal successors, (190), 57 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:59,429 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-14 04:20:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 04:20:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.3333333333333335) internal successors, (190), 57 states have internal predecessors, (190), 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 87 [2024-11-14 04:20:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:59,430 INFO L225 Difference]: With dead ends: 97 [2024-11-14 04:20:59,430 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 04:20:59,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2525 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=688, Invalid=5632, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 04:20:59,431 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:59,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:20:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 04:20:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2024-11-14 04:20:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2024-11-14 04:20:59,438 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2024-11-14 04:20:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:59,438 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2024-11-14 04:20:59,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.3333333333333335) internal successors, (190), 57 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2024-11-14 04:20:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 04:20:59,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:59,439 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:59,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 04:20:59,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:59,639 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:20:59,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1803987882, now seen corresponding path program 11 times [2024-11-14 04:20:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:59,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884198194] [2024-11-14 04:20:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:59,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 49 proven. 230 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:00,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:00,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884198194] [2024-11-14 04:21:00,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884198194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:00,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367919380] [2024-11-14 04:21:00,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:21:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:00,764 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:00,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 04:21:02,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 04:21:02,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:02,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 04:21:02,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:02,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:21:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:02,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367919380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:04,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123184576] [2024-11-14 04:21:04,200 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:21:04,201 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:04,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:04,201 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:04,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:05,205 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:08,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16213#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_520| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_525| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_520| |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_525| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_520|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_525|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_474| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_467| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_474|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_467|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_525|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_474| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_467|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_467|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_474|) 0)))) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:21:08,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2024-11-14 04:21:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351345482] [2024-11-14 04:21:08,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:08,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 04:21:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 04:21:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 04:21:08,109 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 58 states, 57 states have (on average 3.3508771929824563) internal successors, (191), 58 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:09,335 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2024-11-14 04:21:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 04:21:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.3508771929824563) internal successors, (191), 58 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-14 04:21:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:09,336 INFO L225 Difference]: With dead ends: 95 [2024-11-14 04:21:09,336 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 04:21:09,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=680, Invalid=5640, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 04:21:09,337 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:09,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 302 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:21:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 04:21:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-14 04:21:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2024-11-14 04:21:09,341 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2024-11-14 04:21:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:09,342 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2024-11-14 04:21:09,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.3508771929824563) internal successors, (191), 58 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2024-11-14 04:21:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 04:21:09,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:09,343 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:09,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 04:21:09,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:09,544 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:21:09,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1416591428, now seen corresponding path program 18 times [2024-11-14 04:21:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:09,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385397130] [2024-11-14 04:21:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:09,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:10,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385397130] [2024-11-14 04:21:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385397130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424319116] [2024-11-14 04:21:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:21:10,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:10,905 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:10,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 04:21:11,376 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:21:11,376 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:11,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-11-14 04:21:11,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:12,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:21:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:13,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:16,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:16,008 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 99 treesize of output 99 [2024-11-14 04:21:16,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:21:16,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:21:16,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:21:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 04:21:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424319116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705410673] [2024-11-14 04:21:17,163 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:21:17,163 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:17,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:17,164 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:17,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:18,251 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:22,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17076#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_444| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_445| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_493| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_500| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_500| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_493|)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_500|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_493|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_500|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_493|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_444|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_445|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_444|)))' at error location [2024-11-14 04:21:22,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:22,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:22,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 37] total 95 [2024-11-14 04:21:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471402443] [2024-11-14 04:21:22,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:22,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-14 04:21:22,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-14 04:21:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=11023, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 04:21:22,957 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 95 states, 95 states have (on average 2.3473684210526318) internal successors, (223), 95 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:31,977 INFO L93 Difference]: Finished difference Result 276 states and 281 transitions. [2024-11-14 04:21:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-14 04:21:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.3473684210526318) internal successors, (223), 95 states have internal predecessors, (223), 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 92 [2024-11-14 04:21:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:31,979 INFO L225 Difference]: With dead ends: 276 [2024-11-14 04:21:31,979 INFO L226 Difference]: Without dead ends: 101 [2024-11-14 04:21:31,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=795, Invalid=28617, Unknown=0, NotChecked=0, Total=29412 [2024-11-14 04:21:31,980 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:31,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 627 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5243 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 04:21:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-14 04:21:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-11-14 04:21:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2024-11-14 04:21:31,983 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2024-11-14 04:21:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:31,983 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2024-11-14 04:21:31,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.3473684210526318) internal successors, (223), 95 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2024-11-14 04:21:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 04:21:31,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:31,984 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:31,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 04:21:32,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 04:21:32,184 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:21:32,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -124375949, now seen corresponding path program 19 times [2024-11-14 04:21:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277365102] [2024-11-14 04:21:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:33,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277365102] [2024-11-14 04:21:33,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277365102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887214828] [2024-11-14 04:21:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:21:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:33,035 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 04:21:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:33,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 04:21:33,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:33,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:34,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:21:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:34,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887214828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668197326] [2024-11-14 04:21:34,768 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:21:34,768 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:34,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:34,769 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:34,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:35,673 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:38,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18216#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_470| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_469| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_470|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_469|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_517| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_525| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_525| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_517|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_517|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_525|) 0)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_517|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_525|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_469|)))))' at error location [2024-11-14 04:21:38,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:38,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 51 [2024-11-14 04:21:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285323986] [2024-11-14 04:21:38,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:38,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 04:21:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 04:21:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 04:21:38,667 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 53 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 52 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:39,982 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2024-11-14 04:21:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:21:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 52 states have internal predecessors, (162), 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 96 [2024-11-14 04:21:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:39,984 INFO L225 Difference]: With dead ends: 106 [2024-11-14 04:21:39,984 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 04:21:39,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 236 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=403, Invalid=4019, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 04:21:39,985 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:39,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 228 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:21:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 04:21:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2024-11-14 04:21:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2024-11-14 04:21:39,989 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 96 [2024-11-14 04:21:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:39,989 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2024-11-14 04:21:39,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 52 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2024-11-14 04:21:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-14 04:21:39,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:39,990 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:40,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-14 04:21:40,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 04:21:40,191 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:21:40,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 439314243, now seen corresponding path program 12 times [2024-11-14 04:21:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330856086] [2024-11-14 04:21:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 64 proven. 281 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:41,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330856086] [2024-11-14 04:21:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330856086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653259951] [2024-11-14 04:21:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:21:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:41,687 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:41,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 04:21:42,522 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:21:42,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:42,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-14 04:21:42,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:43,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:44,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:21:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:44,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653259951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:44,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232434411] [2024-11-14 04:21:44,742 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:21:44,742 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:44,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:44,742 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:44,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:45,556 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:48,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19081#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_605| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_600| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_600|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_605|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_600| |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_605| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_550| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_542| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_542|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_550| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_542|)) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_605|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_542|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_550|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_550|))) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:21:48,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:48,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 62 [2024-11-14 04:21:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788255133] [2024-11-14 04:21:48,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:48,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 04:21:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 04:21:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=5074, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 04:21:48,148 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 64 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 63 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:49,787 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2024-11-14 04:21:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 04:21:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 63 states have internal predecessors, (187), 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 97 [2024-11-14 04:21:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:49,789 INFO L225 Difference]: With dead ends: 104 [2024-11-14 04:21:49,789 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 04:21:49,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=759, Invalid=6723, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 04:21:49,792 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:49,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 472 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:21:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 04:21:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-14 04:21:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2024-11-14 04:21:49,796 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2024-11-14 04:21:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:49,797 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2024-11-14 04:21:49,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 63 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2024-11-14 04:21:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-14 04:21:49,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:49,798 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:49,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 04:21:49,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:49,998 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:21:49,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 433605809, now seen corresponding path program 20 times [2024-11-14 04:21:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977919289] [2024-11-14 04:21:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 11 proven. 375 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:51,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:51,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977919289] [2024-11-14 04:21:51,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977919289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:51,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898962069] [2024-11-14 04:21:51,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:21:51,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:51,701 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:51,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 04:21:54,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 04:21:54,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:54,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-14 04:21:54,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:55,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:21:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 11 proven. 375 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:21:57,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:00,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:00,286 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 99 treesize of output 99 [2024-11-14 04:22:00,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:22:00,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:00,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:22:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 11 proven. 375 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-14 04:22:01,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898962069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:01,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219789538] [2024-11-14 04:22:01,646 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:22:01,646 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:01,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:01,646 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:01,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:02,721 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:08,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20026#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_511| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_512| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_512|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_511|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_570| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_578| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_570|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_578|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_578|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_511|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_570|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_578| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_570|))))))' at error location [2024-11-14 04:22:08,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:08,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 40, 40] total 103 [2024-11-14 04:22:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119201124] [2024-11-14 04:22:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:08,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-14 04:22:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-14 04:22:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=12753, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 04:22:08,180 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 103 states, 103 states have (on average 2.3689320388349513) internal successors, (244), 103 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:18,186 INFO L93 Difference]: Finished difference Result 302 states and 307 transitions. [2024-11-14 04:22:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-14 04:22:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.3689320388349513) internal successors, (244), 103 states have internal predecessors, (244), 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 101 [2024-11-14 04:22:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:18,187 INFO L225 Difference]: With dead ends: 302 [2024-11-14 04:22:18,187 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 04:22:18,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4539 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=799, Invalid=28957, Unknown=0, NotChecked=0, Total=29756 [2024-11-14 04:22:18,189 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 6353 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 6373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:18,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 737 Invalid, 6373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6353 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 04:22:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 04:22:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2024-11-14 04:22:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2024-11-14 04:22:18,193 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2024-11-14 04:22:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:18,193 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2024-11-14 04:22:18,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.3689320388349513) internal successors, (244), 103 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2024-11-14 04:22:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 04:22:18,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:18,194 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-14 04:22:18,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-14 04:22:18,395 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:22:18,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1194307746, now seen corresponding path program 21 times [2024-11-14 04:22:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:18,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079473838] [2024-11-14 04:22:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 100 proven. 307 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:19,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079473838] [2024-11-14 04:22:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079473838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842211893] [2024-11-14 04:22:19,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:22:19,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:19,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:19,723 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:19,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 04:22:21,180 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:22:21,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:22:21,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-14 04:22:21,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 100 proven. 307 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:22,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:22,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:22:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 100 proven. 307 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842211893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042657311] [2024-11-14 04:22:23,599 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:22:23,599 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:23,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:23,600 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:23,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:24,634 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:27,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21255#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_540| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_539| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_605| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_597| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_597|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_605|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_605|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_539|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_605| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_597|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_597|) 1))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_540|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_539|)))' at error location [2024-11-14 04:22:27,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:27,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:27,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 65 [2024-11-14 04:22:27,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710430273] [2024-11-14 04:22:27,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:27,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 04:22:27,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:27,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 04:22:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=5532, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 04:22:27,912 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 67 states, 66 states have (on average 3.0757575757575757) internal successors, (203), 66 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:29,206 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2024-11-14 04:22:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 04:22:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.0757575757575757) internal successors, (203), 66 states have internal predecessors, (203), 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 105 [2024-11-14 04:22:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:29,207 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:22:29,207 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 04:22:29,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=683, Invalid=5797, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 04:22:29,208 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:29,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:22:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 04:22:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-14 04:22:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2024-11-14 04:22:29,212 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2024-11-14 04:22:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:29,212 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2024-11-14 04:22:29,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.0757575757575757) internal successors, (203), 66 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2024-11-14 04:22:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 04:22:29,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:29,213 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:29,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-14 04:22:29,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-14 04:22:29,416 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:22:29,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1631164172, now seen corresponding path program 13 times [2024-11-14 04:22:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095766630] [2024-11-14 04:22:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 81 proven. 337 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:30,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095766630] [2024-11-14 04:22:30,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095766630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050231123] [2024-11-14 04:22:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:22:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:30,810 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:30,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 04:22:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:31,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-14 04:22:31,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:31,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:32,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:22:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050231123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848955289] [2024-11-14 04:22:32,692 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:22:32,692 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:32,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:32,693 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:32,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:33,518 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:35,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22185#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_687| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_693| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_624| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_632| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_624|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_624|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_632|) 0)) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_632| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_624|)) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_632|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_693|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_687|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_693|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_693| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_687| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:22:35,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:35,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2024-11-14 04:22:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420956451] [2024-11-14 04:22:35,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:35,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 04:22:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 04:22:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=4270, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:22:35,985 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 57 states, 56 states have (on average 3.125) internal successors, (175), 57 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:37,676 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-11-14 04:22:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:22:37,677 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.125) internal successors, (175), 57 states have internal predecessors, (175), 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 106 [2024-11-14 04:22:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:37,677 INFO L225 Difference]: With dead ends: 113 [2024-11-14 04:22:37,677 INFO L226 Difference]: Without dead ends: 113 [2024-11-14 04:22:37,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 264 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=561, Invalid=5919, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 04:22:37,678 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:37,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 548 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:22:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-14 04:22:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-14 04:22:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2024-11-14 04:22:37,681 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 106 [2024-11-14 04:22:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:37,681 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2024-11-14 04:22:37,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.125) internal successors, (175), 57 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2024-11-14 04:22:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 04:22:37,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:37,682 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:37,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 04:22:37,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:37,882 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:22:37,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1832579614, now seen corresponding path program 22 times [2024-11-14 04:22:37,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:37,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359340088] [2024-11-14 04:22:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 12 proven. 451 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:39,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359340088] [2024-11-14 04:22:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359340088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635141] [2024-11-14 04:22:39,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:22:39,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:39,961 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:39,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 04:22:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:40,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-14 04:22:40,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:41,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:22:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 12 proven. 451 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:42,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:47,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:47,242 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 99 treesize of output 99 [2024-11-14 04:22:47,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:22:47,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:22:47,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:22:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 12 proven. 451 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 04:22:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112599380] [2024-11-14 04:22:47,565 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:22:47,565 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:47,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:47,565 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:47,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:48,626 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:53,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23187#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_583| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_585| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_585|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_583|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_662| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_654| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_662|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_654|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_662| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_654|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_583|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_654|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_662|) 0))))))' at error location [2024-11-14 04:22:53,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:53,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:53,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 43] total 86 [2024-11-14 04:22:53,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732122866] [2024-11-14 04:22:53,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:53,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 04:22:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 04:22:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=9247, Unknown=1, NotChecked=0, Total=9506 [2024-11-14 04:22:53,292 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 86 states, 86 states have (on average 2.7790697674418605) internal successors, (239), 86 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:23:02,545 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2024-11-14 04:23:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-11-14 04:23:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.7790697674418605) internal successors, (239), 86 states have internal predecessors, (239), 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 110 [2024-11-14 04:23:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:23:02,547 INFO L225 Difference]: With dead ends: 327 [2024-11-14 04:23:02,547 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 04:23:02,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=634, Invalid=24805, Unknown=1, NotChecked=0, Total=25440 [2024-11-14 04:23:02,548 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 6146 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 6168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:23:02,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 754 Invalid, 6168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6146 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 04:23:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 04:23:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-11-14 04:23:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2024-11-14 04:23:02,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 110 [2024-11-14 04:23:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:23:02,551 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2024-11-14 04:23:02,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.7790697674418605) internal successors, (239), 86 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2024-11-14 04:23:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 04:23:02,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:23:02,552 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 04:23:02,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-14 04:23:02,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:02,752 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:23:02,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:23:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1373670865, now seen corresponding path program 23 times [2024-11-14 04:23:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:23:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800026198] [2024-11-14 04:23:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:23:02,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:23:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:03,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:23:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800026198] [2024-11-14 04:23:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800026198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:23:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793457682] [2024-11-14 04:23:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:23:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:23:03,765 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:23:03,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 04:23:07,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-14 04:23:07,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:23:07,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 04:23:07,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 121 proven. 508 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:23:09,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:23:11,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:23:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793457682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:23:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303398817] [2024-11-14 04:23:12,195 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:23:12,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:23:12,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:23:12,196 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:23:12,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:13,204 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:23:17,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24542#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_612| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_614| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_691| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_682| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_691|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_612|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_682|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_691| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_682|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_682|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_691|) 0)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_614|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_612|)))' at error location [2024-11-14 04:23:17,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:23:17,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:23:17,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 28] total 95 [2024-11-14 04:23:17,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99847436] [2024-11-14 04:23:17,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:23:17,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 04:23:17,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:23:17,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 04:23:17,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=10740, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 04:23:17,026 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 97 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:23:20,323 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2024-11-14 04:23:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 04:23:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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 114 [2024-11-14 04:23:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:23:20,325 INFO L225 Difference]: With dead ends: 124 [2024-11-14 04:23:20,325 INFO L226 Difference]: Without dead ends: 124 [2024-11-14 04:23:20,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1535, Invalid=16555, Unknown=0, NotChecked=0, Total=18090 [2024-11-14 04:23:20,327 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:23:20,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 287 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:23:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-14 04:23:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2024-11-14 04:23:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2024-11-14 04:23:20,331 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 114 [2024-11-14 04:23:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:23:20,331 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2024-11-14 04:23:20,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2024-11-14 04:23:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 04:23:20,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:23:20,332 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 04:23:20,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 04:23:20,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:20,533 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:23:20,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:23:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash -365874779, now seen corresponding path program 14 times [2024-11-14 04:23:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:23:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249716786] [2024-11-14 04:23:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:23:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:23:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 100 proven. 398 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:22,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:23:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249716786] [2024-11-14 04:23:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249716786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:23:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464851937] [2024-11-14 04:23:22,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:23:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:23:22,318 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:23:22,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 04:23:28,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-14 04:23:28,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:23:28,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 04:23:28,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:30,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:23:31,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:23:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:32,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464851937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:23:32,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312890929] [2024-11-14 04:23:32,233 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:23:32,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:23:32,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:23:32,234 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:23:32,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:33,060 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:23:35,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25623#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_779| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_786| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_779| |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_786| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_711| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_720| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_720| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_711|)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_720|) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_786|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_711|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_720|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_711|) 1))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_779|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_786|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:23:35,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:23:35,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:23:35,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2024-11-14 04:23:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300429851] [2024-11-14 04:23:35,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:23:35,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 04:23:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:23:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 04:23:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=8875, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:23:35,945 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 88 states, 87 states have (on average 3.206896551724138) internal successors, (279), 88 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:23:38,493 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2024-11-14 04:23:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 04:23:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.206896551724138) internal successors, (279), 88 states have internal predecessors, (279), 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 115 [2024-11-14 04:23:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:23:38,495 INFO L225 Difference]: With dead ends: 122 [2024-11-14 04:23:38,495 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 04:23:38,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5554 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1528, Invalid=14222, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 04:23:38,497 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:23:38,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 443 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:23:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 04:23:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-14 04:23:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2024-11-14 04:23:38,501 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2024-11-14 04:23:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:23:38,501 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2024-11-14 04:23:38,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.206896551724138) internal successors, (279), 88 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:23:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2024-11-14 04:23:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-14 04:23:38,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:23:38,503 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 04:23:38,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 04:23:38,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-14 04:23:38,703 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:23:38,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:23:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash 625612307, now seen corresponding path program 24 times [2024-11-14 04:23:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:23:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379473068] [2024-11-14 04:23:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:23:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:23:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 13 proven. 534 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:41,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:23:41,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379473068] [2024-11-14 04:23:41,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379473068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:23:41,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040665231] [2024-11-14 04:23:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:23:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:23:41,372 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:23:41,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 04:23:43,196 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:23:43,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:23:43,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 282 conjuncts are in the unsatisfiable core [2024-11-14 04:23:43,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:45,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:23:45,686 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 04:23:45,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 04:23:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 13 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:23:49,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:23:53,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:53,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2024-11-14 04:23:53,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:53,882 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 39 treesize of output 43 [2024-11-14 04:23:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:53,890 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:53,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:53,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2024-11-14 04:23:53,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:23:53,936 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:23:53,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:23:53,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 53 [2024-11-14 04:23:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 13 proven. 534 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-14 04:23:56,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040665231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:23:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096305340] [2024-11-14 04:23:56,173 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:23:56,173 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:23:56,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:23:56,173 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:23:56,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:57,150 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:24:03,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26773#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_660| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_662| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_743| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_752| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_752| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_743|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_660|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_752|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_743|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_743|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_752|) 0)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_662|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_660|)))' at error location [2024-11-14 04:24:03,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:24:03,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:24:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 60, 47] total 134 [2024-11-14 04:24:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917470688] [2024-11-14 04:24:03,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:24:03,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-14 04:24:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-14 04:24:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=20484, Unknown=0, NotChecked=0, Total=21170 [2024-11-14 04:24:03,622 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 134 states, 134 states have (on average 2.298507462686567) internal successors, (308), 134 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:13,036 INFO L93 Difference]: Finished difference Result 353 states and 358 transitions. [2024-11-14 04:24:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-14 04:24:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.298507462686567) internal successors, (308), 134 states have internal predecessors, (308), 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 119 [2024-11-14 04:24:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:13,037 INFO L225 Difference]: With dead ends: 353 [2024-11-14 04:24:13,037 INFO L226 Difference]: Without dead ends: 127 [2024-11-14 04:24:13,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6058 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1465, Invalid=33691, Unknown=0, NotChecked=0, Total=35156 [2024-11-14 04:24:13,039 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 9680 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 9692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 9680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:13,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1152 Invalid, 9692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 9680 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-14 04:24:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-14 04:24:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-11-14 04:24:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2024-11-14 04:24:13,042 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2024-11-14 04:24:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:13,042 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2024-11-14 04:24:13,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.298507462686567) internal successors, (308), 134 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2024-11-14 04:24:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 04:24:13,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:13,043 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:13,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 04:24:13,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-14 04:24:13,248 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:24:13,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1092826692, now seen corresponding path program 25 times [2024-11-14 04:24:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:13,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546844266] [2024-11-14 04:24:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:13,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 144 proven. 428 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:14,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:14,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546844266] [2024-11-14 04:24:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546844266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:14,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507800367] [2024-11-14 04:24:14,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:24:14,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:14,863 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 04:24:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:15,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-14 04:24:15,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:24:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 144 proven. 428 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:16,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:24:17,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:24:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 144 proven. 428 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:17,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507800367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:24:17,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602917251] [2024-11-14 04:24:17,866 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:24:17,866 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:24:17,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:24:17,866 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:24:17,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:24:18,898 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:24:22,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28145#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_694| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_692| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_694|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_692|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_784| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_774| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_692|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_784|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_774|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_784|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_774|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_784| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_774|))))))' at error location [2024-11-14 04:24:22,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:24:22,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:24:22,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 63 [2024-11-14 04:24:22,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582444237] [2024-11-14 04:24:22,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:24:22,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 04:24:22,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 04:24:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 04:24:22,293 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 65 states, 64 states have (on average 3.1875) internal successors, (204), 64 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:23,920 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2024-11-14 04:24:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 04:24:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.1875) internal successors, (204), 64 states have internal predecessors, (204), 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 123 [2024-11-14 04:24:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:23,922 INFO L225 Difference]: With dead ends: 133 [2024-11-14 04:24:23,922 INFO L226 Difference]: Without dead ends: 133 [2024-11-14 04:24:23,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 308 SyntacticMatches, 14 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=577, Invalid=5585, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 04:24:23,923 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:23,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 337 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:24:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-14 04:24:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2024-11-14 04:24:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-11-14 04:24:23,926 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2024-11-14 04:24:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:23,926 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-11-14 04:24:23,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.1875) internal successors, (204), 64 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-11-14 04:24:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:24:23,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:23,927 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:23,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 04:24:24,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-14 04:24:24,128 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:24:24,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -482109550, now seen corresponding path program 15 times [2024-11-14 04:24:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101672123] [2024-11-14 04:24:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 121 proven. 464 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:25,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101672123] [2024-11-14 04:24:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101672123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796272992] [2024-11-14 04:24:25,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:24:25,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:25,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:25,953 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:25,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 04:24:29,832 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:24:29,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:24:29,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-14 04:24:29,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:24:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:31,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:24:32,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:24:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796272992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:24:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350953900] [2024-11-14 04:24:33,380 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:24:33,380 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:24:33,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:24:33,380 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:24:33,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:24:34,405 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:24:37,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29240#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_878| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_885| Int)) (and (= |ULTIMATE.start_cstrcmp_~s2#1.offset| (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_885| 1)) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_815| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_805| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_885|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_805|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_815|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_805|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_815|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_815| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_805|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_878|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_885|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_878| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:24:37,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:24:37,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:24:37,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 77 [2024-11-14 04:24:37,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613120712] [2024-11-14 04:24:37,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:24:37,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-14 04:24:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-14 04:24:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=7186, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 04:24:37,779 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 78 states, 77 states have (on average 3.051948051948052) internal successors, (235), 78 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:40,082 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2024-11-14 04:24:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 04:24:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 3.051948051948052) internal successors, (235), 78 states have internal predecessors, (235), 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 124 [2024-11-14 04:24:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:40,084 INFO L225 Difference]: With dead ends: 131 [2024-11-14 04:24:40,084 INFO L226 Difference]: Without dead ends: 131 [2024-11-14 04:24:40,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3210 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1020, Invalid=9900, Unknown=0, NotChecked=0, Total=10920 [2024-11-14 04:24:40,085 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:40,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 796 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:24:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-14 04:24:40,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-14 04:24:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2024-11-14 04:24:40,089 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 124 [2024-11-14 04:24:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:40,089 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2024-11-14 04:24:40,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 3.051948051948052) internal successors, (235), 78 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:24:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2024-11-14 04:24:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 04:24:40,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:40,090 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:40,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 04:24:40,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 04:24:40,291 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:24:40,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:40,291 INFO L85 PathProgramCache]: Analyzing trace with hash -508707456, now seen corresponding path program 26 times [2024-11-14 04:24:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:40,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568120882] [2024-11-14 04:24:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:40,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 14 proven. 624 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:24:42,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568120882] [2024-11-14 04:24:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568120882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325252401] [2024-11-14 04:24:42,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:24:42,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:42,589 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:42,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 04:24:49,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-14 04:24:49,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:24:49,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 298 conjuncts are in the unsatisfiable core [2024-11-14 04:24:49,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:24:51,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:24:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 14 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:24:54,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:24:58,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:24:58,279 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 99 treesize of output 99 [2024-11-14 04:24:58,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:24:58,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:24:58,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:25:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 14 proven. 624 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-14 04:25:00,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325252401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:00,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55323381] [2024-11-14 04:25:00,188 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:25:00,188 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:00,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:00,188 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:00,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:25:01,014 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:25:06,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30446#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_742| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_744| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_848| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_838| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_848| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_838|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_838|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_848|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_838|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_848|) 0)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_742|))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_744|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_742|)))' at error location [2024-11-14 04:25:06,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:25:06,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:25:06,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 62, 49] total 140 [2024-11-14 04:25:06,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343444650] [2024-11-14 04:25:06,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:25:06,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-14 04:25:06,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-14 04:25:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=22497, Unknown=0, NotChecked=0, Total=22952 [2024-11-14 04:25:06,288 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 140 states, 140 states have (on average 2.3642857142857143) internal successors, (331), 140 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:22,603 INFO L93 Difference]: Finished difference Result 380 states and 385 transitions. [2024-11-14 04:25:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2024-11-14 04:25:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.3642857142857143) internal successors, (331), 140 states have internal predecessors, (331), 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 128 [2024-11-14 04:25:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:22,605 INFO L225 Difference]: With dead ends: 380 [2024-11-14 04:25:22,605 INFO L226 Difference]: Without dead ends: 137 [2024-11-14 04:25:22,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8223 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1123, Invalid=56717, Unknown=0, NotChecked=0, Total=57840 [2024-11-14 04:25:22,607 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 11794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 11820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:22,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1449 Invalid, 11820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11794 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 04:25:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-14 04:25:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2024-11-14 04:25:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2024-11-14 04:25:22,610 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2024-11-14 04:25:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:22,610 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2024-11-14 04:25:22,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.3642857142857143) internal successors, (331), 140 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2024-11-14 04:25:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 04:25:22,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:22,611 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:22,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-14 04:25:22,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:22,816 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:25:22,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -753927889, now seen corresponding path program 27 times [2024-11-14 04:25:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:22,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577831570] [2024-11-14 04:25:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:24,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:24,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577831570] [2024-11-14 04:25:24,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577831570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:24,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491895572] [2024-11-14 04:25:24,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:25:24,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:24,444 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:24,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 04:25:28,160 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:25:28,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:25:28,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-14 04:25:28,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:29,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:30,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:25:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491895572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195268829] [2024-11-14 04:25:31,287 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:25:31,287 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:31,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:31,287 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:31,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:25:32,122 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:25:35,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32019#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_775| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_777| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_880| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_870| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_870|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_775|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_870|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_880|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_880|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_880| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_870|)))) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_777|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_775|)))' at error location [2024-11-14 04:25:35,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:25:35,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:25:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 80 [2024-11-14 04:25:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883476015] [2024-11-14 04:25:35,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:25:35,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 04:25:35,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 04:25:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=7826, Unknown=0, NotChecked=0, Total=8742 [2024-11-14 04:25:35,394 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 82 states, 81 states have (on average 3.0987654320987654) internal successors, (251), 81 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:36,884 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2024-11-14 04:25:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 04:25:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.0987654320987654) internal successors, (251), 81 states have internal predecessors, (251), 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 132 [2024-11-14 04:25:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:36,885 INFO L225 Difference]: With dead ends: 142 [2024-11-14 04:25:36,885 INFO L226 Difference]: Without dead ends: 142 [2024-11-14 04:25:36,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=981, Invalid=8139, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 04:25:36,886 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:36,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 453 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 04:25:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-14 04:25:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2024-11-14 04:25:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2024-11-14 04:25:36,888 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2024-11-14 04:25:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:36,889 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2024-11-14 04:25:36,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.0987654320987654) internal successors, (251), 81 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2024-11-14 04:25:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 04:25:36,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:36,889 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:36,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 04:25:37,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:37,090 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:25:37,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1896926713, now seen corresponding path program 16 times [2024-11-14 04:25:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:37,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489533308] [2024-11-14 04:25:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 144 proven. 535 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:38,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489533308] [2024-11-14 04:25:38,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489533308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721927159] [2024-11-14 04:25:38,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:25:38,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:38,927 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:38,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 04:25:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:39,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-14 04:25:39,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 169 proven. 510 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:40,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:41,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:25:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 169 proven. 510 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:41,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721927159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688004051] [2024-11-14 04:25:41,521 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:25:41,521 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:41,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:41,522 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:41,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:25:42,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:25:44,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33177#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_989| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_981| Int)) (and (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_903| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_913| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_989|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_903|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_913|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_913|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_903|) 1) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_913| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_903|)) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (= |ULTIMATE.start_cstrcmp_~s2#1.offset| (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_989| 1)) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_981| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_981|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_989|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:25:44,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:25:44,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:25:44,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 68 [2024-11-14 04:25:44,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650106106] [2024-11-14 04:25:44,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:25:44,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 04:25:44,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 04:25:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=5878, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 04:25:44,477 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 69 states, 68 states have (on average 3.1911764705882355) internal successors, (217), 69 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:46,419 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2024-11-14 04:25:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 04:25:46,420 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.1911764705882355) internal successors, (217), 69 states have internal predecessors, (217), 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 133 [2024-11-14 04:25:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:46,420 INFO L225 Difference]: With dead ends: 140 [2024-11-14 04:25:46,420 INFO L226 Difference]: Without dead ends: 140 [2024-11-14 04:25:46,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 336 SyntacticMatches, 15 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=798, Invalid=8322, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 04:25:46,421 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:46,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 921 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:25:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-14 04:25:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-14 04:25:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2024-11-14 04:25:46,424 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2024-11-14 04:25:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:46,425 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2024-11-14 04:25:46,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.1911764705882355) internal successors, (217), 69 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2024-11-14 04:25:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 04:25:46,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:46,426 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:46,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 04:25:46,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:46,626 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:25:46,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1080890741, now seen corresponding path program 28 times [2024-11-14 04:25:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709247828] [2024-11-14 04:25:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 15 proven. 721 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:48,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:48,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709247828] [2024-11-14 04:25:48,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709247828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:48,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334634304] [2024-11-14 04:25:48,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:25:48,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:48,586 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:48,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 04:25:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:49,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 284 conjuncts are in the unsatisfiable core [2024-11-14 04:25:49,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:49,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:25:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 15 proven. 721 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:51,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:56,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:56,737 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 99 treesize of output 99 [2024-11-14 04:25:56,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:25:56,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:56,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:25:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 15 proven. 721 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:25:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334634304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761974770] [2024-11-14 04:25:57,016 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:25:57,016 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:57,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:57,016 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:57,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:25:58,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:26:02,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34419#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_827| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_830| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_830|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_827|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_948| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_938| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_938|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_938|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_948|) 0)) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_948|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_948| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_938|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_827|)))))' at error location [2024-11-14 04:26:02,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:26:02,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:26:02,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 52] total 104 [2024-11-14 04:26:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377035825] [2024-11-14 04:26:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:26:02,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-14 04:26:02,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-14 04:26:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=13033, Unknown=1, NotChecked=0, Total=13340 [2024-11-14 04:26:02,642 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 104 states, 104 states have (on average 2.8461538461538463) internal successors, (296), 104 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:15,074 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2024-11-14 04:26:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-14 04:26:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.8461538461538463) internal successors, (296), 104 states have internal predecessors, (296), 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 137 [2024-11-14 04:26:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:15,075 INFO L225 Difference]: With dead ends: 405 [2024-11-14 04:26:15,075 INFO L226 Difference]: Without dead ends: 146 [2024-11-14 04:26:15,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=772, Invalid=36283, Unknown=1, NotChecked=0, Total=37056 [2024-11-14 04:26:15,077 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 9813 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 9841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 9813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:15,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1211 Invalid, 9841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 9813 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 04:26:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-14 04:26:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-11-14 04:26:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.028169014084507) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2024-11-14 04:26:15,080 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2024-11-14 04:26:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:15,080 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2024-11-14 04:26:15,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.8461538461538463) internal successors, (296), 104 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2024-11-14 04:26:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-14 04:26:15,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:15,081 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:15,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 04:26:15,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:15,282 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:26:15,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1223163418, now seen corresponding path program 29 times [2024-11-14 04:26:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530800781] [2024-11-14 04:26:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 196 proven. 569 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:16,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:16,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530800781] [2024-11-14 04:26:16,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530800781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:16,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974406156] [2024-11-14 04:26:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:26:16,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:16,874 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:16,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 04:26:31,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 04:26:31,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:26:31,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-14 04:26:31,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 196 proven. 569 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:32,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:26:34,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 04:26:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 196 proven. 569 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974406156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:26:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584598808] [2024-11-14 04:26:34,928 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:26:34,928 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:26:34,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:26:34,928 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:26:34,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:26:35,782 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:26:38,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36062#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_863| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_866| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_866|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_863|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_973| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_984| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_863|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_973|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_984|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_973|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_984|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_984| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_973|))))))' at error location [2024-11-14 04:26:38,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:26:38,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:26:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2024-11-14 04:26:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728477975] [2024-11-14 04:26:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:26:38,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 04:26:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 04:26:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=8704, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:26:38,879 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 88 states, 87 states have (on average 3.4942528735632186) internal successors, (304), 87 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:26:40,965 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2024-11-14 04:26:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 04:26:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.4942528735632186) internal successors, (304), 87 states have internal predecessors, (304), 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 141 [2024-11-14 04:26:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:26:40,966 INFO L225 Difference]: With dead ends: 151 [2024-11-14 04:26:40,966 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 04:26:40,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 341 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5732 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1546, Invalid=11794, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 04:26:40,967 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:26:40,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 411 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:26:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 04:26:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-11-14 04:26:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2024-11-14 04:26:40,969 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 141 [2024-11-14 04:26:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:26:40,969 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2024-11-14 04:26:40,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.4942528735632186) internal successors, (304), 87 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:26:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2024-11-14 04:26:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-14 04:26:40,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:26:40,970 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2024-11-14 04:26:40,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-14 04:26:41,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:41,170 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:26:41,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:26:41,171 INFO L85 PathProgramCache]: Analyzing trace with hash 736641072, now seen corresponding path program 17 times [2024-11-14 04:26:41,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:26:41,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903646804] [2024-11-14 04:26:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:26:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:26:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 169 proven. 611 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:43,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903646804] [2024-11-14 04:26:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903646804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941060124] [2024-11-14 04:26:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:26:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:43,025 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:43,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 04:26:53,839 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 04:26:53,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:26:53,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 04:26:53,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:53,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:26:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 196 proven. 584 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:54,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:26:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 196 proven. 584 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:26:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941060124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:26:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390295645] [2024-11-14 04:26:57,209 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:26:57,209 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:26:57,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:26:57,209 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:26:57,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:26:58,156 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:27:01,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37339#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1091| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1100| Int)) (and (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1091| |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1091|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1100|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1100| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1008| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1019| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1019|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1008|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1008|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1019|) 0)) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1019| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1008|)) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1100|))) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:27:01,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:27:01,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:27:01,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 87 [2024-11-14 04:27:01,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783960314] [2024-11-14 04:27:01,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:27:01,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 04:27:01,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:27:01,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 04:27:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=8737, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:27:01,674 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 88 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 88 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:27:03,711 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2024-11-14 04:27:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 04:27:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 88 states have internal predecessors, (305), 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 142 [2024-11-14 04:27:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:27:03,712 INFO L225 Difference]: With dead ends: 149 [2024-11-14 04:27:03,712 INFO L226 Difference]: Without dead ends: 149 [2024-11-14 04:27:03,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1538, Invalid=11802, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 04:27:03,714 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:27:03,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 782 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:27:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-14 04:27:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2024-11-14 04:27:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-14 04:27:03,717 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2024-11-14 04:27:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:27:03,717 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-14 04:27:03,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.5057471264367814) internal successors, (305), 88 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-14 04:27:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 04:27:03,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:27:03,717 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2024-11-14 04:27:03,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 04:27:03,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:27:03,918 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:27:03,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:27:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2140084450, now seen corresponding path program 30 times [2024-11-14 04:27:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:27:03,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722137999] [2024-11-14 04:27:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:27:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:27:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 16 proven. 825 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:27:06,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:27:06,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722137999] [2024-11-14 04:27:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722137999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:27:06,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203504291] [2024-11-14 04:27:06,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:27:06,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:27:06,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:27:06,379 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:27:06,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 04:27:19,571 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:27:19,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:27:19,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 309 conjuncts are in the unsatisfiable core [2024-11-14 04:27:19,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:27:20,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:27:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 16 proven. 825 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:27:24,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:27:29,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:27:29,863 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 99 treesize of output 99 [2024-11-14 04:27:29,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-14 04:27:29,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:27:29,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2024-11-14 04:27:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 16 proven. 825 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-14 04:27:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203504291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:27:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770973733] [2024-11-14 04:27:31,959 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:27:31,959 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:27:31,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:27:31,959 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:27:31,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:27:32,770 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:27:38,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38694#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_923| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_920| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_923|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_920|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1057| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1046| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1057|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1046|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1046|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1057|) 0)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_920|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1057| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1046|))))))' at error location [2024-11-14 04:27:38,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:27:38,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:27:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 55, 55] total 143 [2024-11-14 04:27:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187604852] [2024-11-14 04:27:38,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:27:38,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-14 04:27:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:27:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-14 04:27:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=23388, Unknown=0, NotChecked=0, Total=23870 [2024-11-14 04:27:38,367 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 143 states, 143 states have (on average 2.4405594405594404) internal successors, (349), 143 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:27:56,088 INFO L93 Difference]: Finished difference Result 432 states and 437 transitions. [2024-11-14 04:27:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2024-11-14 04:27:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.4405594405594404) internal successors, (349), 143 states have internal predecessors, (349), 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 146 [2024-11-14 04:27:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:27:56,089 INFO L225 Difference]: With dead ends: 432 [2024-11-14 04:27:56,089 INFO L226 Difference]: Without dead ends: 155 [2024-11-14 04:27:56,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8429 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=1114, Invalid=55292, Unknown=0, NotChecked=0, Total=56406 [2024-11-14 04:27:56,091 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 12941 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 12971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 12941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:27:56,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1541 Invalid, 12971 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 12941 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-14 04:27:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-14 04:27:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2024-11-14 04:27:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 152 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2024-11-14 04:27:56,094 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 146 [2024-11-14 04:27:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:27:56,094 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2024-11-14 04:27:56,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.4405594405594404) internal successors, (349), 143 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2024-11-14 04:27:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 04:27:56,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:27:56,095 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2024-11-14 04:27:56,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 04:27:56,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-14 04:27:56,295 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:27:56,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:27:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1072156301, now seen corresponding path program 31 times [2024-11-14 04:27:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:27:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984736623] [2024-11-14 04:27:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:27:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:27:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 225 proven. 647 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:27:58,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:27:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984736623] [2024-11-14 04:27:58,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984736623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:27:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124814027] [2024-11-14 04:27:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:27:58,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:27:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:27:58,341 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:27:58,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 04:27:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:27:58,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-14 04:27:58,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:27:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 225 proven. 647 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:27:59,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:00,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:28:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 225 proven. 647 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:28:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124814027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704707212] [2024-11-14 04:28:01,110 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:28:01,110 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:01,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:01,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:01,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:02,069 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:06,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40409#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_960| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_957| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_960|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_957|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1094| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1082| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_957|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1094| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1082|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1082|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1094|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1082|) 1) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1094|)))))' at error location [2024-11-14 04:28:06,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:06,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:06,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 56 [2024-11-14 04:28:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299399160] [2024-11-14 04:28:06,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:06,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 04:28:06,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 04:28:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4419, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 04:28:06,454 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 58 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:08,525 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-11-14 04:28:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 04:28:08,526 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 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 150 [2024-11-14 04:28:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:08,527 INFO L225 Difference]: With dead ends: 160 [2024-11-14 04:28:08,527 INFO L226 Difference]: Without dead ends: 160 [2024-11-14 04:28:08,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 399 SyntacticMatches, 17 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=473, Invalid=4783, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 04:28:08,527 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 2972 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:08,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 435 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2972 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:28:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-14 04:28:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2024-11-14 04:28:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2024-11-14 04:28:08,530 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 150 [2024-11-14 04:28:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:08,531 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2024-11-14 04:28:08,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2024-11-14 04:28:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 04:28:08,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:08,532 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:08,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-14 04:28:08,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-14 04:28:08,733 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:28:08,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1122891671, now seen corresponding path program 18 times [2024-11-14 04:28:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:08,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241939112] [2024-11-14 04:28:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 196 proven. 692 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:28:11,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241939112] [2024-11-14 04:28:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241939112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537642932] [2024-11-14 04:28:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:28:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:11,278 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 04:28:14,613 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:28:14,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:28:14,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-14 04:28:14,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:28:15,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:17,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:28:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:28:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537642932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212151167] [2024-11-14 04:28:18,366 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:28:18,366 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:18,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:18,366 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:18,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:19,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:22,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41738#(exists ((|v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1216| Int) (|v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1207| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1207|) |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1216|) (= (+ |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1216| 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_#t~post2#1.base_1207| |ULTIMATE.start_cstrcmp_~s2#1.base|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1119| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1131| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1131|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1119|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1131|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1119|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_#t~post2#1.offset_1216|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1131| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1119|)))) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|))))' at error location [2024-11-14 04:28:22,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:22,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:22,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 92 [2024-11-14 04:28:22,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619947089] [2024-11-14 04:28:22,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:22,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 04:28:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 04:28:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=9841, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 04:28:22,090 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 94 states, 93 states have (on average 3.043010752688172) internal successors, (283), 93 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:25,225 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2024-11-14 04:28:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 04:28:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.043010752688172) internal successors, (283), 93 states have internal predecessors, (283), 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 151 [2024-11-14 04:28:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:25,226 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:28:25,226 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 04:28:25,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5447 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1545, Invalid=13461, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 04:28:25,227 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:25,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1020 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2895 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:28:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 04:28:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-14 04:28:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2024-11-14 04:28:25,230 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 151 [2024-11-14 04:28:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:25,230 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2024-11-14 04:28:25,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.043010752688172) internal successors, (283), 93 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2024-11-14 04:28:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-14 04:28:25,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:25,231 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:25,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 04:28:25,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-14 04:28:25,431 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:28:25,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1520036567, now seen corresponding path program 32 times [2024-11-14 04:28:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087589765] [2024-11-14 04:28:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 17 proven. 936 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:28:28,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087589765] [2024-11-14 04:28:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087589765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535243627] [2024-11-14 04:28:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:28:28,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:28,613 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:28,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 04:28:56,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 04:28:56,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:28:56,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 296 conjuncts are in the unsatisfiable core [2024-11-14 04:28:56,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:56,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:28:58,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:28:58,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:29:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 17 proven. 1192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:29:00,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:29:04,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:29:04,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-11-14 04:29:04,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:29:04,650 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 69 treesize of output 58 [2024-11-14 04:29:04,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:29:04,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2024-11-14 04:29:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 17 proven. 936 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:29:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535243627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:29:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711657740] [2024-11-14 04:29:07,012 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:29:07,012 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:29:07,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:29:07,012 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:29:07,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:29:07,881 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:29:13,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43142#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_1020| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_1017| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1020|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1017|) (exists ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1171| Int) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1159| Int)) (and (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1171| 1) (select |#length| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1159|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1017|) (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1171|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1159|) |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_1171|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_#t~post5#1.base_1159|) 1)))))' at error location [2024-11-14 04:29:13,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:29:13,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:29:13,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 58, 42] total 117 [2024-11-14 04:29:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74313504] [2024-11-14 04:29:13,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:29:13,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-14 04:29:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-14 04:29:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=16342, Unknown=1, NotChecked=0, Total=16770 [2024-11-14 04:29:13,697 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 118 states, 118 states have (on average 3.110169491525424) internal successors, (367), 117 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:21,807 INFO L93 Difference]: Finished difference Result 282 states and 285 transitions. [2024-11-14 04:29:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-14 04:29:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.110169491525424) internal successors, (367), 117 states have internal predecessors, (367), 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 155 [2024-11-14 04:29:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:21,809 INFO L225 Difference]: With dead ends: 282 [2024-11-14 04:29:21,809 INFO L226 Difference]: Without dead ends: 161 [2024-11-14 04:29:21,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4797 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=518, Invalid=20943, Unknown=1, NotChecked=0, Total=21462 [2024-11-14 04:29:21,810 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 10024 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 10041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 10024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:21,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1169 Invalid, 10041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 10024 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-14 04:29:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-14 04:29:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2024-11-14 04:29:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-11-14 04:29:21,813 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2024-11-14 04:29:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:21,813 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-11-14 04:29:21,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.110169491525424) internal successors, (367), 117 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-11-14 04:29:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-14 04:29:21,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:21,814 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:21,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-14 04:29:22,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-14 04:29:22,015 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:29:22,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:22,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1935000065, now seen corresponding path program 33 times [2024-11-14 04:29:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:22,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916934686] [2024-11-14 04:29:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:22,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 256 proven. 730 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:29:24,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916934686] [2024-11-14 04:29:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916934686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287583011] [2024-11-14 04:29:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:29:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:24,364 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:24,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874613d2-2d13-4db1-81a2-29a34d018126/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 04:29:57,529 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:29:57,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:29:57,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-14 04:29:57,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 256 proven. 730 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:29:59,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:01,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 04:30:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 256 proven. 730 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-14 04:30:02,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287583011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277531835] [2024-11-14 04:30:02,613 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:30:02,613 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:02,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:02,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:02,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:03,518 INFO L180 IcfgInterpreter]: Interpretation finished