./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-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_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/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_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/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_df4bd999-3cc0-4808-bd57-190e7cefd395/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 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:56:10,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:56:10,913 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:56:10,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:56:10,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:56:10,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:56:10,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:56:10,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:56:10,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:56:10,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:56:10,956 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:56:10,956 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:56:10,957 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:56:10,957 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:56:10,957 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:56:10,957 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:56:10,957 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:56:10,958 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:56:10,958 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:56:10,958 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:56:10,958 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:56:10,958 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:56:10,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:56:10,959 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:56:10,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:56:10,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:56:10,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:56:10,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:56:10,960 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:56:10,960 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:56:10,960 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:56:10,961 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:56:10,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:56:10,961 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:56:10,961 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:56:10,961 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:56:10,962 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:56:10,962 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:56:10,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:56:10,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:56:10,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:56:10,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:56:10,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:56:10,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:56:10,963 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_df4bd999-3cc0-4808-bd57-190e7cefd395/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 -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2024-11-14 03:56:11,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:56:11,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:56:11,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:56:11,283 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:56:11,284 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:56:11,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i Unable to find full path for "g++" [2024-11-14 03:56:13,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:56:13,461 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:56:13,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2024-11-14 03:56:13,484 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/data/3ed937e66/70b664eec0b44d76a7bab4929af7c2f6/FLAGb1b634325 [2024-11-14 03:56:13,505 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/data/3ed937e66/70b664eec0b44d76a7bab4929af7c2f6 [2024-11-14 03:56:13,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:56:13,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:56:13,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:56:13,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:56:13,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:56:13,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:13,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e48a220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13, skipping insertion in model container [2024-11-14 03:56:13,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:13,554 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:56:13,878 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 03:56:13,879 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 03:56:13,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:56:13,902 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:56:13,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:56:13,993 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:56:13,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13 WrapperNode [2024-11-14 03:56:13,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:56:13,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:56:13,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:56:13,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:56:14,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,051 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2024-11-14 03:56:14,053 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:56:14,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:56:14,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:56:14,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:56:14,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:56:14,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:56:14,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:56:14,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:56:14,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (1/1) ... [2024-11-14 03:56:14,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:56:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:14,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:56:14,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:56:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:56:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:56:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:56:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:56:14,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:56:14,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:56:14,338 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:56:14,341 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:56:14,664 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2024-11-14 03:56:14,666 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:56:14,781 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:56:14,782 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 03:56:14,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:56:14 BoogieIcfgContainer [2024-11-14 03:56:14,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:56:14,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:56:14,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:56:14,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:56:14,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:56:13" (1/3) ... [2024-11-14 03:56:14,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c31d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:56:14, skipping insertion in model container [2024-11-14 03:56:14,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:13" (2/3) ... [2024-11-14 03:56:14,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c31d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:56:14, skipping insertion in model container [2024-11-14 03:56:14,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:56:14" (3/3) ... [2024-11-14 03:56:14,794 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2024-11-14 03:56:14,815 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:56:14,817 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrspn-alloca-1.i that has 1 procedures, 39 locations, 1 initial locations, 4 loop locations, and 19 error locations. [2024-11-14 03:56:14,865 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:56:14,879 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;@34a5aa00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:56:14,879 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-14 03:56:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:56:14,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:14,893 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:56:14,894 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 03:56:14,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 152576, now seen corresponding path program 1 times [2024-11-14 03:56:14,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:14,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727066436] [2024-11-14 03:56:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:15,296 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 03:56:15,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:15,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727066436] [2024-11-14 03:56:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727066436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:56:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832971985] [2024-11-14 03:56:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:15,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:15,345 INFO L87 Difference]: Start difference. First operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 03:56:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:15,440 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-14 03:56:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:15,443 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 03:56:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:15,451 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:56:15,451 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 03:56:15,453 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 03:56:15,456 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 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 03:56:15,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 03:56:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 03:56:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-14 03:56:15,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2024-11-14 03:56:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:15,499 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-14 03:56:15,499 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 03:56:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-14 03:56:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:56:15,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:15,500 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:56:15,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:56:15,501 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 03:56:15,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 152577, now seen corresponding path program 1 times [2024-11-14 03:56:15,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:15,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477210353] [2024-11-14 03:56:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:15,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:15,994 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 03:56:15,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:15,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477210353] [2024-11-14 03:56:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477210353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:15,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585560471] [2024-11-14 03:56:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:15,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:15,998 INFO L87 Difference]: Start difference. First operand 36 states and 41 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 03:56:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:16,132 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-14 03:56:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:16,132 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 03:56:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:16,133 INFO L225 Difference]: With dead ends: 38 [2024-11-14 03:56:16,133 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 03:56:16,134 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 03:56:16,134 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:16,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 03:56:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-14 03:56:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 37 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 03:56:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-14 03:56:16,140 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 3 [2024-11-14 03:56:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:16,140 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-14 03:56:16,141 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 03:56:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-14 03:56:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:56:16,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:16,141 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:56:16,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:56:16,142 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 03:56:16,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 4832197, now seen corresponding path program 1 times [2024-11-14 03:56:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:16,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050478533] [2024-11-14 03:56:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:16,284 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 03:56:16,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050478533] [2024-11-14 03:56:16,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050478533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:16,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:16,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:56:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284352937] [2024-11-14 03:56:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:16,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:16,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:16,286 INFO L87 Difference]: Start difference. First operand 38 states and 44 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 03:56:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:16,355 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-14 03:56:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:16,357 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 03:56:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:16,358 INFO L225 Difference]: With dead ends: 36 [2024-11-14 03:56:16,358 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 03:56:16,358 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 03:56:16,361 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 41 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 03:56:16,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 03:56:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 03:56:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 2.0) internal successors, (42), 35 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 03:56:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-14 03:56:16,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 4 [2024-11-14 03:56:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:16,371 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-14 03:56:16,371 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 03:56:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-14 03:56:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:56:16,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:16,371 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:56:16,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:56:16,372 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 03:56:16,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash 4832198, now seen corresponding path program 1 times [2024-11-14 03:56:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:16,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377634291] [2024-11-14 03:56:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:16,702 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 03:56:16,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:16,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377634291] [2024-11-14 03:56:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377634291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:16,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111664422] [2024-11-14 03:56:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:16,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:56:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:56:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:56:16,706 INFO L87 Difference]: Start difference. First operand 36 states and 42 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 03:56:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:16,867 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-14 03:56:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:56:16,868 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 03:56:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:16,868 INFO L225 Difference]: With dead ends: 38 [2024-11-14 03:56:16,868 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 03:56:16,869 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 03:56:16,870 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:16,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 03:56:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-14 03:56:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 37 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 03:56:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-11-14 03:56:16,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 4 [2024-11-14 03:56:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:16,877 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-11-14 03:56:16,877 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 03:56:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-11-14 03:56:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:56:16,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:16,879 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:56:16,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:56:16,880 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 03:56:16,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 4834779, now seen corresponding path program 1 times [2024-11-14 03:56:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052696318] [2024-11-14 03:56:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:17,164 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 03:56:17,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052696318] [2024-11-14 03:56:17,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052696318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:17,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:17,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019707579] [2024-11-14 03:56:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:17,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:17,167 INFO L87 Difference]: Start difference. First operand 38 states and 45 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 03:56:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:17,254 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-11-14 03:56:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:17,255 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 03:56:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:17,256 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:56:17,256 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 03:56:17,256 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 03:56:17,257 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:17,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 03:56:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-14 03:56:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.9130434782608696) 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 03:56:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-14 03:56:17,267 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 4 [2024-11-14 03:56:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:17,268 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-14 03:56:17,268 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 03:56:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-14 03:56:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:56:17,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:17,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:56:17,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:56:17,269 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 03:56:17,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 149878140, now seen corresponding path program 1 times [2024-11-14 03:56:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251822493] [2024-11-14 03:56:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:17,711 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 03:56:17,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:17,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251822493] [2024-11-14 03:56:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251822493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:17,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:17,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622875467] [2024-11-14 03:56:17,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:17,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:56:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:56:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:56:17,716 INFO L87 Difference]: Start difference. First operand 37 states and 44 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 03:56:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:17,794 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-14 03:56:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:17,795 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 03:56:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:17,797 INFO L225 Difference]: With dead ends: 36 [2024-11-14 03:56:17,797 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 03:56:17,798 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 03:56:17,799 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:17,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 03:56:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 03:56:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 35 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 03:56:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-14 03:56:17,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 5 [2024-11-14 03:56:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:17,806 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-14 03:56:17,808 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 03:56:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-14 03:56:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:56:17,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:17,809 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 03:56:17,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:56:17,810 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:17,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 146712765, now seen corresponding path program 1 times [2024-11-14 03:56:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:17,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940909411] [2024-11-14 03:56:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:18,135 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 03:56:18,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940909411] [2024-11-14 03:56:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940909411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004224162] [2024-11-14 03:56:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:18,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:18,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:18,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:56:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:18,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:56:18,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:56:18,420 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 7 [2024-11-14 03:56:18,435 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 18 treesize of output 16 [2024-11-14 03:56:18,589 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 03:56:18,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:18,771 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 03:56:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004224162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371722660] [2024-11-14 03:56:18,794 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 03:56:18,794 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:18,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:18,804 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:18,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:19,680 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:19,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '548#(and (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet14#1| 127) (exists ((|v_ULTIMATE.start_main_~i~0#1_36| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_36| 2) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_36|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_36|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet14#1|)))' at error location [2024-11-14 03:56:19,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:19,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:19,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 03:56:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965541906] [2024-11-14 03:56:19,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:19,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:56:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:56:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:56:19,916 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:56:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:20,219 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-11-14 03:56:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:56:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:56:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:20,220 INFO L225 Difference]: With dead ends: 36 [2024-11-14 03:56:20,220 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 03:56:20,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:56:20,222 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:20,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:56:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 03:56:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-11-14 03:56:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-14 03:56:20,228 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 5 [2024-11-14 03:56:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:20,229 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-14 03:56:20,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:56:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-14 03:56:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:56:20,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:20,229 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 03:56:20,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:56:20,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:20,439 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:20,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 348844464, now seen corresponding path program 1 times [2024-11-14 03:56:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151662818] [2024-11-14 03:56:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:20,840 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 03:56:20,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151662818] [2024-11-14 03:56:20,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151662818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449449115] [2024-11-14 03:56:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:20,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:20,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:20,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:56:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:20,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:56:20,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:20,954 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 7 [2024-11-14 03:56:20,965 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 8 treesize of output 1 [2024-11-14 03:56:21,170 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 03:56:21,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:21,370 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 03:56:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449449115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561214271] [2024-11-14 03:56:21,373 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:56:21,374 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:21,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:21,375 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:21,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:21,943 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:22,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '670#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_35| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_35|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0))' at error location [2024-11-14 03:56:22,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:22,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 03:56:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971146959] [2024-11-14 03:56:22,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:22,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:56:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:56:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:56:22,485 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 03:56:22,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:22,751 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-14 03:56:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:56:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 03:56:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:22,753 INFO L225 Difference]: With dead ends: 33 [2024-11-14 03:56:22,753 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 03:56:22,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2024-11-14 03:56:22,754 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:22,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 124 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:56:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 03:56:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-14 03:56:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 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 03:56:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-14 03:56:22,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 6 [2024-11-14 03:56:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:22,758 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-14 03:56:22,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 03:56:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-14 03:56:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:56:22,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:22,760 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:56:22,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:56:22,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:22,964 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:22,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 351257056, now seen corresponding path program 1 times [2024-11-14 03:56:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:22,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395113134] [2024-11-14 03:56:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,012 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 03:56:23,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395113134] [2024-11-14 03:56:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395113134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112175549] [2024-11-14 03:56:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:23,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:23,016 INFO L87 Difference]: Start difference. First operand 30 states and 35 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 03:56:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,075 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-14 03:56:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:23,075 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 03:56:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,076 INFO L225 Difference]: With dead ends: 28 [2024-11-14 03:56:23,076 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:56:23,076 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 03:56:23,077 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:23,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:56:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 03:56:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.736842105263158) internal successors, (33), 27 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 03:56:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-14 03:56:23,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 6 [2024-11-14 03:56:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,085 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-14 03:56:23,085 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 03:56:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-14 03:56:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:56:23,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,086 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:56:23,086 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash 351257057, now seen corresponding path program 1 times [2024-11-14 03:56:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:23,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837357706] [2024-11-14 03:56:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,186 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 03:56:23,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837357706] [2024-11-14 03:56:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837357706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:23,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678178057] [2024-11-14 03:56:23,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:56:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:56:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:56:23,188 INFO L87 Difference]: Start difference. First operand 28 states and 33 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 03:56:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,279 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-11-14 03:56:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:23,280 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 03:56:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,281 INFO L225 Difference]: With dead ends: 44 [2024-11-14 03:56:23,281 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 03:56:23,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:56:23,282 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:23,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 03:56:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2024-11-14 03:56:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 03:56:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-14 03:56:23,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2024-11-14 03:56:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,286 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-14 03:56:23,287 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 03:56:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-14 03:56:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:56:23,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:56:23,288 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1758658646, now seen corresponding path program 1 times [2024-11-14 03:56:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:23,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896162980] [2024-11-14 03:56:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:23,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,347 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 03:56:23,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896162980] [2024-11-14 03:56:23,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896162980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556527372] [2024-11-14 03:56:23,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:23,349 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 03:56:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,407 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-14 03:56:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 03:56:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,411 INFO L225 Difference]: With dead ends: 28 [2024-11-14 03:56:23,412 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:56:23,412 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 03:56:23,412 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:23,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:56:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:56:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 03:56:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 27 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 03:56:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-14 03:56:23,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2024-11-14 03:56:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,415 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-14 03:56:23,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 03:56:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-14 03:56:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:56:23,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,415 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:56:23,416 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1758658647, now seen corresponding path program 1 times [2024-11-14 03:56:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:23,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430862833] [2024-11-14 03:56:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,583 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 03:56:23,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430862833] [2024-11-14 03:56:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430862833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419292790] [2024-11-14 03:56:23,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:56:23,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:56:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:56:23,586 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 03:56:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,706 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-14 03:56:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:56:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 03:56:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,707 INFO L225 Difference]: With dead ends: 33 [2024-11-14 03:56:23,708 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 03:56:23,708 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 03:56:23,708 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:23,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 03:56:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 03:56:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-14 03:56:23,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 9 [2024-11-14 03:56:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,716 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-14 03:56:23,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 03:56:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-14 03:56:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:56:23,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:56:23,716 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1316226772, now seen corresponding path program 1 times [2024-11-14 03:56:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:23,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226364975] [2024-11-14 03:56:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,870 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 03:56:23,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226364975] [2024-11-14 03:56:23,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226364975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:23,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136696302] [2024-11-14 03:56:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:23,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:23,872 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:56:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,920 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-14 03:56:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:56:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,922 INFO L225 Difference]: With dead ends: 32 [2024-11-14 03:56:23,922 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:56:23,922 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 03:56:23,922 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 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 03:56:23,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:56:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:56:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 03:56:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 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 03:56:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-14 03:56:23,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 10 [2024-11-14 03:56:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,928 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-14 03:56:23,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 03:56:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-14 03:56:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:56:23,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,929 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:56:23,929 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2104895742, now seen corresponding path program 1 times [2024-11-14 03:56:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584824670] [2024-11-14 03:56:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:23,960 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 03:56:23,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584824670] [2024-11-14 03:56:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584824670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:23,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:23,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258003746] [2024-11-14 03:56:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:23,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:23,962 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 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 03:56:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:23,990 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-11-14 03:56:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 03:56:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:23,991 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:56:23,991 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 03:56:23,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:23,992 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:23,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:56:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 03:56:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 03:56:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 03:56:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-14 03:56:23,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 12 [2024-11-14 03:56:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:23,997 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-14 03:56:23,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 03:56:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-14 03:56:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:56:23,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:23,998 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:23,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:56:23,999 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:23,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -827408868, now seen corresponding path program 1 times [2024-11-14 03:56:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:24,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793315079] [2024-11-14 03:56:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:24,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793315079] [2024-11-14 03:56:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793315079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:24,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:56:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996139072] [2024-11-14 03:56:24,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:24,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:56:24,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:56:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:56:24,312 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 03:56:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:24,418 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-14 03:56:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:56:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 03:56:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:24,419 INFO L225 Difference]: With dead ends: 39 [2024-11-14 03:56:24,419 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 03:56:24,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:56:24,420 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:24,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 03:56:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-14 03:56:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 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 03:56:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-14 03:56:24,422 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 13 [2024-11-14 03:56:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:24,423 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-14 03:56:24,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 03:56:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-14 03:56:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:56:24,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:24,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:24,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:56:24,424 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:24,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2131056600, now seen corresponding path program 1 times [2024-11-14 03:56:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067572995] [2024-11-14 03:56:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:24,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:24,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067572995] [2024-11-14 03:56:24,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067572995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:24,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:24,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:56:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641097956] [2024-11-14 03:56:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:24,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:56:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:56:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:56:24,774 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:56:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:24,897 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-14 03:56:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:56:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:56:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:24,898 INFO L225 Difference]: With dead ends: 49 [2024-11-14 03:56:24,898 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 03:56:24,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:56:24,899 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:24,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 03:56:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2024-11-14 03:56:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 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 03:56:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-14 03:56:24,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 15 [2024-11-14 03:56:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:24,906 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-14 03:56:24,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:56:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-14 03:56:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:56:24,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:24,907 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:24,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:56:24,907 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:24,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1642867506, now seen corresponding path program 1 times [2024-11-14 03:56:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:24,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776017002] [2024-11-14 03:56:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:25,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776017002] [2024-11-14 03:56:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776017002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:25,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:25,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:56:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912831513] [2024-11-14 03:56:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:25,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:56:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:56:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:56:25,026 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:56:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:25,166 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-11-14 03:56:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:56:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 03:56:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:25,167 INFO L225 Difference]: With dead ends: 46 [2024-11-14 03:56:25,167 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 03:56:25,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:56:25,167 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:25,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 03:56:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 03:56:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 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 03:56:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-14 03:56:25,174 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2024-11-14 03:56:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:25,174 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-14 03:56:25,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:56:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-14 03:56:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:56:25,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:25,175 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:25,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 03:56:25,175 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:25,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1343116754, now seen corresponding path program 1 times [2024-11-14 03:56:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:25,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822676103] [2024-11-14 03:56:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:25,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:25,458 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 03:56:25,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:25,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822676103] [2024-11-14 03:56:25,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822676103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:25,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997581867] [2024-11-14 03:56:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:25,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:25,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:25,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:25,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:56:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:25,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:56:25,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:25,716 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 03:56:25,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:25,810 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 03:56:25,888 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 03:56:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997581867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940456562] [2024-11-14 03:56:25,890 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:25,892 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:25,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:25,892 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:25,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:26,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:27,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1546#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:56:27,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:27,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-14 03:56:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047630784] [2024-11-14 03:56:27,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:27,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:56:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:56:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:56:27,459 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 03:56:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:27,671 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-14 03:56:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:56:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 17 [2024-11-14 03:56:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:27,673 INFO L225 Difference]: With dead ends: 39 [2024-11-14 03:56:27,673 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 03:56:27,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:56:27,674 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:27,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 50 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 03:56:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2024-11-14 03:56:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 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 03:56:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-14 03:56:27,680 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2024-11-14 03:56:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:27,680 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-14 03:56:27,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 03:56:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-14 03:56:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:56:27,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:27,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:27,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:56:27,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:56:27,882 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 03:56:27,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2049918362, now seen corresponding path program 1 times [2024-11-14 03:56:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758446347] [2024-11-14 03:56:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:28,086 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 03:56:28,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758446347] [2024-11-14 03:56:28,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758446347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951504200] [2024-11-14 03:56:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:28,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:28,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:28,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:28,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:56:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:28,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:56:28,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:28,309 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 03:56:28,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:28,455 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 03:56:28,484 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 03:56:28,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951504200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:28,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641184076] [2024-11-14 03:56:28,486 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:56:28,487 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:28,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:28,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:28,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:29,455 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:30,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1761#(and (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:56:30,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:30,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:30,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-14 03:56:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541818160] [2024-11-14 03:56:30,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:30,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:56:30,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:56:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:56:30,292 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 03:56:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:30,491 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-11-14 03:56:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:56:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) Word has length 19 [2024-11-14 03:56:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:30,492 INFO L225 Difference]: With dead ends: 56 [2024-11-14 03:56:30,492 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 03:56:30,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:56:30,493 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:30,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 92 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:56:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 03:56:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2024-11-14 03:56:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 03:56:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-14 03:56:30,499 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2024-11-14 03:56:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:30,499 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-14 03:56:30,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 03:56:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-14 03:56:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 03:56:30,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:30,500 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:30,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:56:30,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:30,700 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:30,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1339644813, now seen corresponding path program 2 times [2024-11-14 03:56:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:30,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202414794] [2024-11-14 03:56:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:31,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:31,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202414794] [2024-11-14 03:56:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202414794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:31,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349484401] [2024-11-14 03:56:31,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:31,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:31,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:31,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:56:31,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:56:31,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:31,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 03:56:31,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:31,450 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 03:56:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:31,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:31,525 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 15 treesize of output 13 [2024-11-14 03:56:31,529 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 16 treesize of output 12 [2024-11-14 03:56:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:31,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349484401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391109531] [2024-11-14 03:56:31,587 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:31,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:31,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:31,590 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:31,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:32,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:32,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2013#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:56:32,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:32,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:32,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-14 03:56:32,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815947345] [2024-11-14 03:56:32,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:32,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:56:32,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:32,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:56:32,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:56:32,953 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 03:56:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:33,184 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2024-11-14 03:56:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:56:33,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) Word has length 21 [2024-11-14 03:56:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:33,185 INFO L225 Difference]: With dead ends: 69 [2024-11-14 03:56:33,185 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 03:56:33,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:56:33,186 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:33,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:56:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 03:56:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-14 03:56:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 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 03:56:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-14 03:56:33,192 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2024-11-14 03:56:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:33,192 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-14 03:56:33,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 03:56:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-14 03:56:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:56:33,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:33,193 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:33,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:56:33,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:33,394 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 03:56:33,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash 73752137, now seen corresponding path program 3 times [2024-11-14 03:56:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:33,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933979720] [2024-11-14 03:56:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:33,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:33,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933979720] [2024-11-14 03:56:33,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933979720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:33,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603417235] [2024-11-14 03:56:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:56:33,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:33,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:33,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:56:33,841 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:56:33,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:33,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 03:56:33,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:33,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:34,118 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 03:56:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603417235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078465952] [2024-11-14 03:56:34,240 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:34,240 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:34,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:34,240 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:34,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:34,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:35,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2323#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:56:35,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:35,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:35,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-14 03:56:35,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011024940] [2024-11-14 03:56:35,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:35,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:56:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:56:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:56:35,650 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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 03:56:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:36,032 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-11-14 03:56:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:56:36,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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 23 [2024-11-14 03:56:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:36,033 INFO L225 Difference]: With dead ends: 84 [2024-11-14 03:56:36,033 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 03:56:36,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:56:36,034 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:36,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 137 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:56:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 03:56:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2024-11-14 03:56:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 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 03:56:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-11-14 03:56:36,045 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 23 [2024-11-14 03:56:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:36,045 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-11-14 03:56:36,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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 03:56:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-11-14 03:56:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:56:36,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:36,046 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:36,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:56:36,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:56:36,246 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:36,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2099041038, now seen corresponding path program 4 times [2024-11-14 03:56:36,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:36,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335558847] [2024-11-14 03:56:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:36,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:56:36,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:36,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335558847] [2024-11-14 03:56:36,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335558847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:36,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116073743] [2024-11-14 03:56:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:56:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:36,897 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:36,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:56:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:37,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:56:37,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:37,109 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 03:56:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:37,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:37,208 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 15 treesize of output 13 [2024-11-14 03:56:37,210 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 16 treesize of output 12 [2024-11-14 03:56:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116073743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722536327] [2024-11-14 03:56:37,284 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:37,284 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:37,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:37,285 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:37,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:37,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:38,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2681#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:56:38,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:38,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:38,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 25 [2024-11-14 03:56:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170397234] [2024-11-14 03:56:38,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:38,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:56:38,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:56:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:56:38,817 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:39,398 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2024-11-14 03:56:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:56:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 03:56:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:39,400 INFO L225 Difference]: With dead ends: 155 [2024-11-14 03:56:39,400 INFO L226 Difference]: Without dead ends: 147 [2024-11-14 03:56:39,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=203, Invalid=2449, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:56:39,402 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:39,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 225 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:56:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-14 03:56:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2024-11-14 03:56:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.17) internal successors, (117), 101 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 03:56:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2024-11-14 03:56:39,411 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 27 [2024-11-14 03:56:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:39,412 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2024-11-14 03:56:39,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2024-11-14 03:56:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:56:39,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:39,415 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:39,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:56:39,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:56:39,615 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 03:56:39,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 227390063, now seen corresponding path program 2 times [2024-11-14 03:56:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502105461] [2024-11-14 03:56:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:40,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:40,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502105461] [2024-11-14 03:56:40,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502105461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:40,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937253131] [2024-11-14 03:56:40,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:40,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:40,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:40,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:56:40,128 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:56:40,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:40,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:56:40,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:40,156 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-14 03:56:40,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 13 [2024-11-14 03:56:40,278 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 03:56:40,310 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 03:56:40,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:56:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:40,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:40,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:56:40,550 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 03:56:40,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:56:40,562 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 03:56:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937253131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672036005] [2024-11-14 03:56:40,747 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:56:40,747 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:40,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:40,748 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:40,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:41,489 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:42,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2978#true' at error location [2024-11-14 03:56:42,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:42,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:42,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 25 [2024-11-14 03:56:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530199945] [2024-11-14 03:56:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:42,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:56:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:56:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1353, Unknown=4, NotChecked=0, Total=1482 [2024-11-14 03:56:42,300 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 03:56:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:42,620 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2024-11-14 03:56:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:56:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 03:56:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:42,621 INFO L225 Difference]: With dead ends: 165 [2024-11-14 03:56:42,621 INFO L226 Difference]: Without dead ends: 131 [2024-11-14 03:56:42,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=1804, Unknown=8, NotChecked=0, Total=1980 [2024-11-14 03:56:42,623 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:42,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 115 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:56:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-14 03:56:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-11-14 03:56:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 128 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 03:56:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2024-11-14 03:56:42,627 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 28 [2024-11-14 03:56:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:42,628 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2024-11-14 03:56:42,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 03:56:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2024-11-14 03:56:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:56:42,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:42,629 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:42,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:56:42,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:56:42,830 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:42,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1004383132, now seen corresponding path program 5 times [2024-11-14 03:56:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:42,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737604402] [2024-11-14 03:56:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:42,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:43,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737604402] [2024-11-14 03:56:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737604402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889208319] [2024-11-14 03:56:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:43,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:43,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:56:43,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:56:43,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:43,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 03:56:43,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:43,319 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 03:56:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:43,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889208319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798410590] [2024-11-14 03:56:43,868 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:43,868 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:43,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:43,869 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:43,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:44,403 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:45,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3685#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:56:45,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:45,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2024-11-14 03:56:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106062586] [2024-11-14 03:56:45,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:45,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:56:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:45,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:56:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:56:45,121 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 03:56:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:45,527 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2024-11-14 03:56:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:56:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 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 03:56:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:45,528 INFO L225 Difference]: With dead ends: 159 [2024-11-14 03:56:45,528 INFO L226 Difference]: Without dead ends: 159 [2024-11-14 03:56:45,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:56:45,529 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:45,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 174 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:56:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-14 03:56:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2024-11-14 03:56:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.158273381294964) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 03:56:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2024-11-14 03:56:45,537 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 29 [2024-11-14 03:56:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:45,538 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2024-11-14 03:56:45,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 03:56:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2024-11-14 03:56:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:56:45,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:45,540 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:45,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:56:45,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 03:56:45,740 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:45,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1154422477, now seen corresponding path program 3 times [2024-11-14 03:56:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826775193] [2024-11-14 03:56:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:45,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:45,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:45,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826775193] [2024-11-14 03:56:45,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826775193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:45,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443190923] [2024-11-14 03:56:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:56:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:45,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:45,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:56:46,091 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:56:46,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:46,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:56:46,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:46,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:46,423 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 03:56:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:46,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443190923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:46,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400809471] [2024-11-14 03:56:46,461 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:56:46,461 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:46,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:46,462 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:46,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:47,041 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:47,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4008#true' at error location [2024-11-14 03:56:47,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:47,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-14 03:56:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822779160] [2024-11-14 03:56:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:47,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:56:47,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:56:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:56:47,754 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:47,980 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2024-11-14 03:56:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:56:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-14 03:56:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:47,982 INFO L225 Difference]: With dead ends: 229 [2024-11-14 03:56:47,982 INFO L226 Difference]: Without dead ends: 229 [2024-11-14 03:56:47,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:56:47,983 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:47,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:56:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-14 03:56:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 185. [2024-11-14 03:56:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.1530054644808743) internal successors, (211), 184 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 03:56:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 211 transitions. [2024-11-14 03:56:47,989 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 211 transitions. Word has length 30 [2024-11-14 03:56:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:47,990 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 211 transitions. [2024-11-14 03:56:47,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 211 transitions. [2024-11-14 03:56:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:56:47,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:47,991 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:48,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:56:48,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:56:48,195 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:48,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1964293207, now seen corresponding path program 6 times [2024-11-14 03:56:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:48,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074863384] [2024-11-14 03:56:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:48,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074863384] [2024-11-14 03:56:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074863384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79664411] [2024-11-14 03:56:48,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:56:48,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:48,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:48,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:48,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:56:48,747 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:56:48,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:48,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 03:56:48,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:48,865 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 03:56:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:48,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:48,966 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 15 treesize of output 13 [2024-11-14 03:56:48,968 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 16 treesize of output 12 [2024-11-14 03:56:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:49,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79664411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:49,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560458842] [2024-11-14 03:56:49,035 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:49,035 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:49,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:49,035 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:49,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:49,632 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:50,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4848#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:56:50,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:50,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:50,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-11-14 03:56:50,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341781508] [2024-11-14 03:56:50,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:50,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:56:50,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:56:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1352, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:56:50,385 INFO L87 Difference]: Start difference. First operand 185 states and 211 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:50,821 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2024-11-14 03:56:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:56:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 03:56:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:50,823 INFO L225 Difference]: With dead ends: 277 [2024-11-14 03:56:50,823 INFO L226 Difference]: Without dead ends: 252 [2024-11-14 03:56:50,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:56:50,824 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:50,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 252 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:56:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-14 03:56:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2024-11-14 03:56:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 241 states have (on average 1.1493775933609958) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 03:56:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2024-11-14 03:56:50,831 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 33 [2024-11-14 03:56:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:50,832 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2024-11-14 03:56:50,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2024-11-14 03:56:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:56:50,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:50,833 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:50,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 03:56:51,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:51,037 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:51,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2090603393, now seen corresponding path program 7 times [2024-11-14 03:56:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:51,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376716271] [2024-11-14 03:56:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:51,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:51,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376716271] [2024-11-14 03:56:51,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376716271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:51,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994293481] [2024-11-14 03:56:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:56:51,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:51,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:51,546 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:51,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:56:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:51,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:56:51,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:51,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:52,145 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 03:56:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:52,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994293481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207631174] [2024-11-14 03:56:52,235 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:52,235 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:52,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:52,237 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:52,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:52,797 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:53,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5633#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:56:53,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:53,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:53,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2024-11-14 03:56:53,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975379190] [2024-11-14 03:56:53,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:53,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:56:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:56:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:56:53,532 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 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 03:56:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:54,207 INFO L93 Difference]: Finished difference Result 287 states and 326 transitions. [2024-11-14 03:56:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:56:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 03:56:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:54,208 INFO L225 Difference]: With dead ends: 287 [2024-11-14 03:56:54,209 INFO L226 Difference]: Without dead ends: 287 [2024-11-14 03:56:54,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 03:56:54,210 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:54,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 223 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:56:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-14 03:56:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 259. [2024-11-14 03:56:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.1517509727626458) internal successors, (296), 258 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 03:56:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 296 transitions. [2024-11-14 03:56:54,227 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 296 transitions. Word has length 35 [2024-11-14 03:56:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:54,228 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 296 transitions. [2024-11-14 03:56:54,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 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 03:56:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 296 transitions. [2024-11-14 03:56:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:56:54,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:54,229 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:54,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:56:54,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:56:54,429 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:56:54,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash 555570756, now seen corresponding path program 8 times [2024-11-14 03:56:54,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:54,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188599916] [2024-11-14 03:56:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:54,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:54,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188599916] [2024-11-14 03:56:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188599916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343507312] [2024-11-14 03:56:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:54,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:54,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:54,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:56:55,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:56:55,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:55,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 03:56:55,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:55,237 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 14 treesize of output 10 [2024-11-14 03:56:55,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:56:55,819 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 32 treesize of output 29 [2024-11-14 03:56:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:55,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:56,801 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 13 treesize of output 11 [2024-11-14 03:56:56,806 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 22 treesize of output 20 [2024-11-14 03:56:56,812 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 03:56:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:56:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343507312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928365987] [2024-11-14 03:56:56,887 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:56:56,887 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:56,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:56,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:56,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:57,310 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:58,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6474#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:56:58,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:58,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:58,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2024-11-14 03:56:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096675453] [2024-11-14 03:56:58,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:58,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:56:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:56:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:56:58,211 INFO L87 Difference]: Start difference. First operand 259 states and 296 transitions. Second operand has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 03:57:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:08,671 INFO L93 Difference]: Finished difference Result 417 states and 469 transitions. [2024-11-14 03:57:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:57:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 03:57:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:08,673 INFO L225 Difference]: With dead ends: 417 [2024-11-14 03:57:08,673 INFO L226 Difference]: Without dead ends: 388 [2024-11-14 03:57:08,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=575, Invalid=4827, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 03:57:08,676 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 308 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:08,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 265 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:57:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-14 03:57:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 345. [2024-11-14 03:57:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 343 states have (on average 1.154518950437318) internal successors, (396), 344 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 03:57:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 396 transitions. [2024-11-14 03:57:08,688 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 396 transitions. Word has length 39 [2024-11-14 03:57:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:08,688 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 396 transitions. [2024-11-14 03:57:08,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 03:57:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 396 transitions. [2024-11-14 03:57:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:57:08,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:08,690 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:08,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:57:08,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:57:08,894 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 03:57:08,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash 546835190, now seen corresponding path program 4 times [2024-11-14 03:57:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362743485] [2024-11-14 03:57:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:08,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:10,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362743485] [2024-11-14 03:57:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362743485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329344483] [2024-11-14 03:57:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:57:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:10,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:10,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:57:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:10,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 03:57:10,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:10,801 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 03:57:11,022 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 03:57:11,074 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 03:57:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:11,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:11,368 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_490 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_490) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 03:57:11,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:11,375 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 03:57:11,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:11,384 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 03:57:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:11,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329344483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:11,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433008319] [2024-11-14 03:57:11,517 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:57:11,517 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:11,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:11,517 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:11,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:11,976 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:13,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7289#true' at error location [2024-11-14 03:57:13,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:13,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 13] total 34 [2024-11-14 03:57:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359058696] [2024-11-14 03:57:13,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:13,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:57:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:57:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2033, Unknown=1, NotChecked=90, Total=2256 [2024-11-14 03:57:13,136 INFO L87 Difference]: Start difference. First operand 345 states and 396 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 03:57:14,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:14,589 INFO L93 Difference]: Finished difference Result 577 states and 649 transitions. [2024-11-14 03:57:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:57:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 03:57:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:14,591 INFO L225 Difference]: With dead ends: 577 [2024-11-14 03:57:14,592 INFO L226 Difference]: Without dead ends: 421 [2024-11-14 03:57:14,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=224, Invalid=3561, Unknown=1, NotChecked=120, Total=3906 [2024-11-14 03:57:14,593 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:14,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 233 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 848 Invalid, 0 Unknown, 70 Unchecked, 0.7s Time] [2024-11-14 03:57:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-14 03:57:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 390. [2024-11-14 03:57:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 388 states have (on average 1.1597938144329898) internal successors, (450), 389 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 03:57:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 450 transitions. [2024-11-14 03:57:14,605 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 450 transitions. Word has length 39 [2024-11-14 03:57:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:14,605 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 450 transitions. [2024-11-14 03:57:14,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 03:57:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 450 transitions. [2024-11-14 03:57:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:57:14,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:14,606 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:14,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:57:14,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:57:14,807 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 03:57:14,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash -67522126, now seen corresponding path program 5 times [2024-11-14 03:57:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:14,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748653161] [2024-11-14 03:57:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:15,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748653161] [2024-11-14 03:57:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748653161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150151379] [2024-11-14 03:57:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:57:15,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:15,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:15,118 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:15,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:57:15,304 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:57:15,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:15,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:57:15,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:15,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:15,862 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 03:57:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:15,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150151379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:15,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499472363] [2024-11-14 03:57:15,920 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:57:15,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:15,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:15,920 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:15,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:16,536 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:17,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8830#(and (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:57:17,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:17,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:17,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2024-11-14 03:57:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207193062] [2024-11-14 03:57:17,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:17,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:57:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:57:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:57:17,434 INFO L87 Difference]: Start difference. First operand 390 states and 450 transitions. Second operand has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 03:57:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:17,752 INFO L93 Difference]: Finished difference Result 569 states and 651 transitions. [2024-11-14 03:57:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:57:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 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 03:57:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:17,754 INFO L225 Difference]: With dead ends: 569 [2024-11-14 03:57:17,754 INFO L226 Difference]: Without dead ends: 569 [2024-11-14 03:57:17,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:57:17,756 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:17,756 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 146 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:57:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-11-14 03:57:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 480. [2024-11-14 03:57:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 478 states have (on average 1.1569037656903767) internal successors, (553), 479 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 03:57:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 553 transitions. [2024-11-14 03:57:17,771 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 553 transitions. Word has length 41 [2024-11-14 03:57:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:17,771 INFO L471 AbstractCegarLoop]: Abstraction has 480 states and 553 transitions. [2024-11-14 03:57:17,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 03:57:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 553 transitions. [2024-11-14 03:57:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:57:17,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:17,773 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:17,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:57:17,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:17,973 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:17,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1539730143, now seen corresponding path program 9 times [2024-11-14 03:57:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:17,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003052763] [2024-11-14 03:57:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:18,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003052763] [2024-11-14 03:57:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003052763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739698852] [2024-11-14 03:57:18,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:57:18,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:18,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:18,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:18,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:57:18,746 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:57:18,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:18,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 03:57:18,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:18,896 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 03:57:18,973 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 7 treesize of output 3 [2024-11-14 03:57:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:18,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:19,036 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 15 treesize of output 13 [2024-11-14 03:57:19,039 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 16 treesize of output 12 [2024-11-14 03:57:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:19,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739698852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:19,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175707515] [2024-11-14 03:57:19,121 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:19,121 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:19,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:19,121 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:19,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:19,596 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:20,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10191#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:57:20,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:20,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2024-11-14 03:57:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242606077] [2024-11-14 03:57:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:20,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:57:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:57:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:57:20,425 INFO L87 Difference]: Start difference. First operand 480 states and 553 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 03:57:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:21,349 INFO L93 Difference]: Finished difference Result 677 states and 772 transitions. [2024-11-14 03:57:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:57:21,350 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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) Word has length 45 [2024-11-14 03:57:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:21,352 INFO L225 Difference]: With dead ends: 677 [2024-11-14 03:57:21,352 INFO L226 Difference]: Without dead ends: 609 [2024-11-14 03:57:21,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=228, Invalid=2852, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:57:21,353 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:21,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 331 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:57:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-11-14 03:57:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 589. [2024-11-14 03:57:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 587 states have (on average 1.1584327086882453) internal successors, (680), 588 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 03:57:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 680 transitions. [2024-11-14 03:57:21,370 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 680 transitions. Word has length 45 [2024-11-14 03:57:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:21,371 INFO L471 AbstractCegarLoop]: Abstraction has 589 states and 680 transitions. [2024-11-14 03:57:21,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 03:57:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 680 transitions. [2024-11-14 03:57:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:57:21,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:21,372 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:21,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:57:21,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-14 03:57:21,573 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:21,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607435, now seen corresponding path program 10 times [2024-11-14 03:57:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:21,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753166050] [2024-11-14 03:57:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:22,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:22,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753166050] [2024-11-14 03:57:22,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753166050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:22,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168021320] [2024-11-14 03:57:22,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:57:22,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:22,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:22,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:57:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:22,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 03:57:22,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:22,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:22,988 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 03:57:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168021320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929964899] [2024-11-14 03:57:23,104 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:23,104 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:23,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:23,104 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:23,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:23,527 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:24,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11808#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:57:24,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:24,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 36 [2024-11-14 03:57:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217672729] [2024-11-14 03:57:24,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:24,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 03:57:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 03:57:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:57:24,360 INFO L87 Difference]: Start difference. First operand 589 states and 680 transitions. Second operand has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 03:57:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:25,130 INFO L93 Difference]: Finished difference Result 667 states and 767 transitions. [2024-11-14 03:57:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:57:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 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 03:57:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:25,133 INFO L225 Difference]: With dead ends: 667 [2024-11-14 03:57:25,133 INFO L226 Difference]: Without dead ends: 667 [2024-11-14 03:57:25,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 03:57:25,135 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 189 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:25,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 336 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:57:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-11-14 03:57:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 613. [2024-11-14 03:57:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 611 states have (on average 1.160392798690671) internal successors, (709), 612 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 03:57:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 709 transitions. [2024-11-14 03:57:25,155 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 709 transitions. Word has length 47 [2024-11-14 03:57:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:25,155 INFO L471 AbstractCegarLoop]: Abstraction has 613 states and 709 transitions. [2024-11-14 03:57:25,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 03:57:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 709 transitions. [2024-11-14 03:57:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:57:25,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:25,157 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:25,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 03:57:25,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 03:57:25,361 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 03:57:25,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash -778084009, now seen corresponding path program 6 times [2024-11-14 03:57:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223927421] [2024-11-14 03:57:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:26,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223927421] [2024-11-14 03:57:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223927421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086218951] [2024-11-14 03:57:26,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:57:26,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:26,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:26,102 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:26,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:57:26,249 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:57:26,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:26,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:57:26,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:26,258 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 03:57:26,454 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 03:57:26,487 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 03:57:26,854 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-14 03:57:26,854 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 23 treesize of output 20 [2024-11-14 03:57:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:26,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:27,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:27,201 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 03:57:27,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:27,211 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 03:57:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086218951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727527104] [2024-11-14 03:57:27,341 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:57:27,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:27,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:27,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:27,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:27,846 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:28,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13117#true' at error location [2024-11-14 03:57:28,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:28,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 39 [2024-11-14 03:57:28,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102870616] [2024-11-14 03:57:28,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:28,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 03:57:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 03:57:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2579, Unknown=16, NotChecked=0, Total=2756 [2024-11-14 03:57:28,991 INFO L87 Difference]: Start difference. First operand 613 states and 709 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 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 03:57:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:30,432 INFO L93 Difference]: Finished difference Result 1442 states and 1621 transitions. [2024-11-14 03:57:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:57:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 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 50 [2024-11-14 03:57:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:30,435 INFO L225 Difference]: With dead ends: 1442 [2024-11-14 03:57:30,435 INFO L226 Difference]: Without dead ends: 874 [2024-11-14 03:57:30,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=307, Invalid=4643, Unknown=20, NotChecked=0, Total=4970 [2024-11-14 03:57:30,437 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:30,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 376 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:57:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2024-11-14 03:57:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 698. [2024-11-14 03:57:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 696 states have (on average 1.1666666666666667) internal successors, (812), 697 states have internal predecessors, (812), 0 states have call successors, (0), 0 states 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 03:57:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 812 transitions. [2024-11-14 03:57:30,455 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 812 transitions. Word has length 50 [2024-11-14 03:57:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:30,456 INFO L471 AbstractCegarLoop]: Abstraction has 698 states and 812 transitions. [2024-11-14 03:57:30,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 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 03:57:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 812 transitions. [2024-11-14 03:57:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 03:57:30,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:30,457 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:30,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:57:30,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:30,660 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:30,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash -578690694, now seen corresponding path program 11 times [2024-11-14 03:57:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261450689] [2024-11-14 03:57:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:31,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261450689] [2024-11-14 03:57:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261450689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607856910] [2024-11-14 03:57:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:57:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:31,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:31,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:57:31,681 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 03:57:31,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:31,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 03:57:31,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:31,870 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 03:57:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:31,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:32,021 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 15 treesize of output 13 [2024-11-14 03:57:32,023 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 16 treesize of output 12 [2024-11-14 03:57:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:32,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607856910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336119428] [2024-11-14 03:57:32,102 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:32,102 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:32,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:32,103 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:32,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:32,508 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:33,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15974#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:57:33,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2024-11-14 03:57:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782626681] [2024-11-14 03:57:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:33,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:57:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:57:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:57:33,589 INFO L87 Difference]: Start difference. First operand 698 states and 812 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 03:57:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:34,573 INFO L93 Difference]: Finished difference Result 1001 states and 1153 transitions. [2024-11-14 03:57:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:57:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 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 51 [2024-11-14 03:57:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:34,576 INFO L225 Difference]: With dead ends: 1001 [2024-11-14 03:57:34,576 INFO L226 Difference]: Without dead ends: 850 [2024-11-14 03:57:34,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=251, Invalid=3655, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:57:34,577 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:34,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 515 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:57:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2024-11-14 03:57:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 825. [2024-11-14 03:57:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 823 states have (on average 1.1676792223572297) internal successors, (961), 824 states have internal predecessors, (961), 0 states have call successors, (0), 0 states 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 03:57:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 961 transitions. [2024-11-14 03:57:34,594 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 961 transitions. Word has length 51 [2024-11-14 03:57:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:34,595 INFO L471 AbstractCegarLoop]: Abstraction has 825 states and 961 transitions. [2024-11-14 03:57:34,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 03:57:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 961 transitions. [2024-11-14 03:57:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 03:57:34,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:34,596 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:34,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:57:34,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:34,797 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:34,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1756402405, now seen corresponding path program 7 times [2024-11-14 03:57:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:34,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193655617] [2024-11-14 03:57:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:35,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193655617] [2024-11-14 03:57:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193655617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837685181] [2024-11-14 03:57:35,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:57:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:35,158 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:35,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:57:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:35,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:57:35,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:35,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:35,819 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 03:57:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:35,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837685181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:35,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069964691] [2024-11-14 03:57:35,892 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:57:35,892 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:35,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:35,892 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:35,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:36,347 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:37,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17844#true' at error location [2024-11-14 03:57:37,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:37,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2024-11-14 03:57:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541820438] [2024-11-14 03:57:37,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:37,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 03:57:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 03:57:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:57:37,146 INFO L87 Difference]: Start difference. First operand 825 states and 961 transitions. Second operand has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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 03:57:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:37,578 INFO L93 Difference]: Finished difference Result 1119 states and 1296 transitions. [2024-11-14 03:57:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:57:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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) Word has length 52 [2024-11-14 03:57:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:37,582 INFO L225 Difference]: With dead ends: 1119 [2024-11-14 03:57:37,582 INFO L226 Difference]: Without dead ends: 1119 [2024-11-14 03:57:37,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:57:37,583 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:37,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 294 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:57:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-11-14 03:57:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 973. [2024-11-14 03:57:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 971 states have (on average 1.1658084449021626) internal successors, (1132), 972 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states 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 03:57:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1132 transitions. [2024-11-14 03:57:37,609 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1132 transitions. Word has length 52 [2024-11-14 03:57:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:37,609 INFO L471 AbstractCegarLoop]: Abstraction has 973 states and 1132 transitions. [2024-11-14 03:57:37,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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 03:57:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1132 transitions. [2024-11-14 03:57:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:57:37,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:37,611 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:37,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:57:37,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:37,813 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:37,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1687044304, now seen corresponding path program 12 times [2024-11-14 03:57:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348294630] [2024-11-14 03:57:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 25 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:38,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348294630] [2024-11-14 03:57:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348294630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712902040] [2024-11-14 03:57:38,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:57:38,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:38,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:38,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:57:39,064 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:57:39,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:39,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 03:57:39,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:39,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:39,892 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 03:57:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712902040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:40,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651439234] [2024-11-14 03:57:40,218 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:40,218 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:40,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:40,218 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:40,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:40,626 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:41,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20646#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:57:41,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:41,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:41,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2024-11-14 03:57:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85429201] [2024-11-14 03:57:41,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:41,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:57:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:57:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3260, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:57:41,684 INFO L87 Difference]: Start difference. First operand 973 states and 1132 transitions. Second operand has 49 states, 48 states have (on average 2.7916666666666665) internal successors, (134), 48 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 03:57:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:42,622 INFO L93 Difference]: Finished difference Result 1101 states and 1275 transitions. [2024-11-14 03:57:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:57:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.7916666666666665) internal successors, (134), 48 states have internal predecessors, (134), 0 states have call successors, (0), 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 53 [2024-11-14 03:57:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:42,626 INFO L225 Difference]: With dead ends: 1101 [2024-11-14 03:57:42,626 INFO L226 Difference]: Without dead ends: 1101 [2024-11-14 03:57:42,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=528, Invalid=4442, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:57:42,627 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 157 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:42,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 356 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:57:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-11-14 03:57:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1009. [2024-11-14 03:57:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1007 states have (on average 1.1678252234359483) internal successors, (1176), 1008 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 03:57:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1176 transitions. [2024-11-14 03:57:42,647 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1176 transitions. Word has length 53 [2024-11-14 03:57:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:42,648 INFO L471 AbstractCegarLoop]: Abstraction has 1009 states and 1176 transitions. [2024-11-14 03:57:42,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.7916666666666665) internal successors, (134), 48 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 03:57:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1176 transitions. [2024-11-14 03:57:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-14 03:57:42,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:42,650 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:42,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:57:42,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:42,850 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:42,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 24320533, now seen corresponding path program 13 times [2024-11-14 03:57:42,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:42,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473332099] [2024-11-14 03:57:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:43,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473332099] [2024-11-14 03:57:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473332099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537645072] [2024-11-14 03:57:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:57:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:43,725 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:43,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:57:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:43,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-14 03:57:43,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:44,182 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 03:57:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:44,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:44,337 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 15 treesize of output 13 [2024-11-14 03:57:44,339 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 16 treesize of output 12 [2024-11-14 03:57:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:44,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537645072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:44,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077117621] [2024-11-14 03:57:44,429 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:44,429 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:44,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:44,430 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:44,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:44,898 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:45,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23161#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:57:45,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:45,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:45,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2024-11-14 03:57:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184480451] [2024-11-14 03:57:45,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:45,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 03:57:45,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 03:57:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:57:45,826 INFO L87 Difference]: Start difference. First operand 1009 states and 1176 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 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 03:57:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:47,014 INFO L93 Difference]: Finished difference Result 1392 states and 1610 transitions. [2024-11-14 03:57:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 03:57:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 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) Word has length 57 [2024-11-14 03:57:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:47,017 INFO L225 Difference]: With dead ends: 1392 [2024-11-14 03:57:47,017 INFO L226 Difference]: Without dead ends: 1220 [2024-11-14 03:57:47,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=274, Invalid=4016, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 03:57:47,017 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:47,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 598 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:57:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2024-11-14 03:57:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1185. [2024-11-14 03:57:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1183 states have (on average 1.1699070160608622) internal successors, (1384), 1184 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 03:57:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1384 transitions. [2024-11-14 03:57:47,038 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1384 transitions. Word has length 57 [2024-11-14 03:57:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:47,039 INFO L471 AbstractCegarLoop]: Abstraction has 1185 states and 1384 transitions. [2024-11-14 03:57:47,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 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 03:57:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1384 transitions. [2024-11-14 03:57:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 03:57:47,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:47,041 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:47,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:57:47,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 03:57:47,245 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:57:47,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1154752747, now seen corresponding path program 14 times [2024-11-14 03:57:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:47,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213799477] [2024-11-14 03:57:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 36 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:48,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:48,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213799477] [2024-11-14 03:57:48,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213799477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:48,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821062544] [2024-11-14 03:57:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:57:48,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:48,168 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:48,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:57:48,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 03:57:48,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:48,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 03:57:48,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:49,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:49,598 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 03:57:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:49,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821062544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671559994] [2024-11-14 03:57:49,798 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:57:49,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:49,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:49,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:49,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:50,226 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:51,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26185#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:57:51,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:51,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:51,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2024-11-14 03:57:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897096451] [2024-11-14 03:57:51,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:51,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:57:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:51,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:57:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 03:57:51,211 INFO L87 Difference]: Start difference. First operand 1185 states and 1384 transitions. Second operand has 53 states, 52 states have (on average 2.980769230769231) internal successors, (155), 53 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 03:57:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:52,143 INFO L93 Difference]: Finished difference Result 1321 states and 1535 transitions. [2024-11-14 03:57:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:57:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.980769230769231) internal successors, (155), 53 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 59 [2024-11-14 03:57:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:52,146 INFO L225 Difference]: With dead ends: 1321 [2024-11-14 03:57:52,146 INFO L226 Difference]: Without dead ends: 1321 [2024-11-14 03:57:52,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=634, Invalid=4916, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 03:57:52,147 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:52,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 386 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:57:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2024-11-14 03:57:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1221. [2024-11-14 03:57:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1219 states have (on average 1.1714520098441346) internal successors, (1428), 1220 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 03:57:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1428 transitions. [2024-11-14 03:57:52,186 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1428 transitions. Word has length 59 [2024-11-14 03:57:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:52,186 INFO L471 AbstractCegarLoop]: Abstraction has 1221 states and 1428 transitions. [2024-11-14 03:57:52,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.980769230769231) internal successors, (155), 53 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 03:57:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1428 transitions. [2024-11-14 03:57:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:57:52,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:52,189 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:52,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:57:52,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 03:57:52,389 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 03:57:52,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash -39097330, now seen corresponding path program 8 times [2024-11-14 03:57:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49704164] [2024-11-14 03:57:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:53,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:53,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49704164] [2024-11-14 03:57:53,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49704164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:53,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794106599] [2024-11-14 03:57:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:57:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:53,377 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:53,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:57:53,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:57:53,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:53,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 03:57:53,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:53,750 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 03:57:54,055 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 03:57:54,103 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 23 treesize of output 22 [2024-11-14 03:57:55,436 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:57:55,436 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 32 treesize of output 18 [2024-11-14 03:57:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:55,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:56,604 INFO L349 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2024-11-14 03:57:56,604 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 177 treesize of output 142 [2024-11-14 03:57:56,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:56,622 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 142 treesize of output 136 [2024-11-14 03:57:56,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:56,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2024-11-14 03:57:56,871 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2024-11-14 03:57:56,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:56,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 200 [2024-11-14 03:57:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:57:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794106599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370613229] [2024-11-14 03:57:57,803 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:57:57,803 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:57,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:57,804 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:57,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:58,282 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:00,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28760#true' at error location [2024-11-14 03:58:00,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:00,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:00,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 57 [2024-11-14 03:58:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925100398] [2024-11-14 03:58:00,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:00,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 03:58:00,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 03:58:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4755, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:58:00,075 INFO L87 Difference]: Start difference. First operand 1221 states and 1428 transitions. Second operand has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 03:58:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:03,406 INFO L93 Difference]: Finished difference Result 2646 states and 3064 transitions. [2024-11-14 03:58:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 03:58:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 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 03:58:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:03,411 INFO L225 Difference]: With dead ends: 2646 [2024-11-14 03:58:03,411 INFO L226 Difference]: Without dead ends: 2585 [2024-11-14 03:58:03,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=398, Invalid=8722, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 03:58:03,412 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:03,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 683 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 03:58:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2024-11-14 03:58:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2023. [2024-11-14 03:58:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2021 states have (on average 1.1687283523008412) internal successors, (2362), 2022 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states 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 03:58:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2362 transitions. [2024-11-14 03:58:03,453 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2362 transitions. Word has length 61 [2024-11-14 03:58:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:03,454 INFO L471 AbstractCegarLoop]: Abstraction has 2023 states and 2362 transitions. [2024-11-14 03:58:03,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 03:58:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2362 transitions. [2024-11-14 03:58:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 03:58:03,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:03,457 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:03,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:58:03,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:58:03,658 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:03,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1924827984, now seen corresponding path program 15 times [2024-11-14 03:58:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100026359] [2024-11-14 03:58:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:04,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:04,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100026359] [2024-11-14 03:58:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100026359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:04,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451789513] [2024-11-14 03:58:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:58:04,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:04,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:04,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:58:04,987 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:58:04,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:04,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 03:58:04,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:05,313 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 03:58:05,451 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 7 treesize of output 3 [2024-11-14 03:58:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:05,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:05,532 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 15 treesize of output 13 [2024-11-14 03:58:05,534 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 16 treesize of output 12 [2024-11-14 03:58:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451789513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905570763] [2024-11-14 03:58:05,646 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:05,646 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:05,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:05,647 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:05,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:06,128 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:07,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34322#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:58:07,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:07,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:07,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2024-11-14 03:58:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703768582] [2024-11-14 03:58:07,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:07,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 03:58:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 03:58:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2484, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:58:07,229 INFO L87 Difference]: Start difference. First operand 2023 states and 2362 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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 03:58:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:08,851 INFO L93 Difference]: Finished difference Result 2646 states and 3073 transitions. [2024-11-14 03:58:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:58:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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) Word has length 63 [2024-11-14 03:58:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:08,856 INFO L225 Difference]: With dead ends: 2646 [2024-11-14 03:58:08,857 INFO L226 Difference]: Without dead ends: 2447 [2024-11-14 03:58:08,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=297, Invalid=4673, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:58:08,857 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:08,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 645 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:58:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2024-11-14 03:58:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2378. [2024-11-14 03:58:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2376 states have (on average 1.1712962962962963) internal successors, (2783), 2377 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states 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 03:58:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 2783 transitions. [2024-11-14 03:58:08,893 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 2783 transitions. Word has length 63 [2024-11-14 03:58:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:08,893 INFO L471 AbstractCegarLoop]: Abstraction has 2378 states and 2783 transitions. [2024-11-14 03:58:08,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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 03:58:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 2783 transitions. [2024-11-14 03:58:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 03:58:08,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:08,897 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:08,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:58:09,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:58:09,098 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:09,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1343823306, now seen corresponding path program 9 times [2024-11-14 03:58:09,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:09,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571475423] [2024-11-14 03:58:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:09,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571475423] [2024-11-14 03:58:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571475423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209082740] [2024-11-14 03:58:09,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:58:09,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:09,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:09,564 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:09,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:58:09,790 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:58:09,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:09,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:58:09,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:10,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:10,500 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 03:58:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209082740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:10,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11974912] [2024-11-14 03:58:10,750 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:58:10,751 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:10,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:10,751 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:10,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:11,284 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:12,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39396#true' at error location [2024-11-14 03:58:12,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:12,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:12,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-14 03:58:12,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930378266] [2024-11-14 03:58:12,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:12,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 03:58:12,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:12,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 03:58:12,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:58:12,223 INFO L87 Difference]: Start difference. First operand 2378 states and 2783 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 35 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 03:58:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:12,771 INFO L93 Difference]: Finished difference Result 2827 states and 3302 transitions. [2024-11-14 03:58:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:58:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 35 states have internal predecessors, (152), 0 states have call successors, (0), 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 63 [2024-11-14 03:58:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:12,776 INFO L225 Difference]: With dead ends: 2827 [2024-11-14 03:58:12,776 INFO L226 Difference]: Without dead ends: 2827 [2024-11-14 03:58:12,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:58:12,777 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:12,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 374 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:58:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2024-11-14 03:58:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2604. [2024-11-14 03:58:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2602 states have (on average 1.1710222905457341) internal successors, (3047), 2603 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states 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 03:58:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3047 transitions. [2024-11-14 03:58:12,813 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3047 transitions. Word has length 63 [2024-11-14 03:58:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:12,814 INFO L471 AbstractCegarLoop]: Abstraction has 2604 states and 3047 transitions. [2024-11-14 03:58:12,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 35 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 03:58:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3047 transitions. [2024-11-14 03:58:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 03:58:12,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:12,818 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:12,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:13,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:13,018 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:13,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:13,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1581284602, now seen corresponding path program 16 times [2024-11-14 03:58:13,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:13,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310265519] [2024-11-14 03:58:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:13,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 49 proven. 185 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:14,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310265519] [2024-11-14 03:58:14,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310265519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719201210] [2024-11-14 03:58:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:58:14,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:14,141 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:14,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:58:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:14,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-14 03:58:14,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:14,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:15,321 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 03:58:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:15,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719201210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:15,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576498155] [2024-11-14 03:58:15,549 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:15,549 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:15,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:15,549 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:15,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:16,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:17,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45683#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:58:17,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:17,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:17,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 48 [2024-11-14 03:58:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557832640] [2024-11-14 03:58:17,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:17,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:58:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:58:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3560, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:58:17,124 INFO L87 Difference]: Start difference. First operand 2604 states and 3047 transitions. Second operand has 49 states, 48 states have (on average 2.875) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 03:58:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:18,255 INFO L93 Difference]: Finished difference Result 2833 states and 3301 transitions. [2024-11-14 03:58:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:58:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.875) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 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 03:58:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:18,261 INFO L225 Difference]: With dead ends: 2833 [2024-11-14 03:58:18,261 INFO L226 Difference]: Without dead ends: 2833 [2024-11-14 03:58:18,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=502, Invalid=5048, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 03:58:18,262 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:18,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 449 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:58:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2024-11-14 03:58:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2660. [2024-11-14 03:58:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2658 states have (on average 1.1723100075244546) internal successors, (3116), 2659 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states 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 03:58:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 3116 transitions. [2024-11-14 03:58:18,295 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 3116 transitions. Word has length 65 [2024-11-14 03:58:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:18,295 INFO L471 AbstractCegarLoop]: Abstraction has 2660 states and 3116 transitions. [2024-11-14 03:58:18,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.875) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 03:58:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 3116 transitions. [2024-11-14 03:58:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 03:58:18,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:18,299 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:18,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:58:18,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:18,500 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 03:58:18,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -3884183, now seen corresponding path program 1 times [2024-11-14 03:58:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417526413] [2024-11-14 03:58:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 49 proven. 78 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:58:19,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417526413] [2024-11-14 03:58:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417526413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876482608] [2024-11-14 03:58:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:19,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:19,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:19,212 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:19,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:58:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:19,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 03:58:19,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:19,432 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 03:58:19,628 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 03:58:19,658 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 03:58:19,887 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-14 03:58:19,887 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 23 treesize of output 20 [2024-11-14 03:58:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 122 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:58:19,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:20,191 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1103 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1103) |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 03:58:20,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:20,199 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 03:58:20,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:20,208 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 37 treesize of output 32 [2024-11-14 03:58:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:58:20,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876482608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:20,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392910604] [2024-11-14 03:58:20,399 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:58:20,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:20,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:20,400 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:20,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:21,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:22,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51646#(exists ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_148| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.base_148| Int)) (and (<= 1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_148|) (<= (select |#length| |v_ULTIMATE.start_cstrspn_~sc1~0#1.base_148|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_148|) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (exists ((|v_ULTIMATE.start_cstrspn_~s~0#1.offset_350| Int) (|v_ULTIMATE.start_cstrspn_~s~0#1.base_351| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) 0)) (or (and (= (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) 256) (+ 256 (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|))) (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) 256))) (and (= (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) 256) (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) 127))) (<= (+ |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350| 1) (select |#length| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|)) (<= 0 |v_ULTIMATE.start_cstrspn_~s~0#1.offset_350|) (= (select |#valid| |v_ULTIMATE.start_cstrspn_~s~0#1.base_351|) 1))) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0)))' at error location [2024-11-14 03:58:22,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:22,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2024-11-14 03:58:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746269039] [2024-11-14 03:58:22,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:22,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 03:58:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 03:58:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2393, Unknown=1, NotChecked=98, Total=2652 [2024-11-14 03:58:22,648 INFO L87 Difference]: Start difference. First operand 2660 states and 3116 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 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 03:58:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:23,447 INFO L93 Difference]: Finished difference Result 2625 states and 3069 transitions. [2024-11-14 03:58:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:58:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 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) Word has length 67 [2024-11-14 03:58:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:23,451 INFO L225 Difference]: With dead ends: 2625 [2024-11-14 03:58:23,451 INFO L226 Difference]: Without dead ends: 1893 [2024-11-14 03:58:23,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=189, Invalid=2894, Unknown=1, NotChecked=108, Total=3192 [2024-11-14 03:58:23,452 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:23,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 546 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1093 Invalid, 0 Unknown, 75 Unchecked, 0.6s Time] [2024-11-14 03:58:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2024-11-14 03:58:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1685. [2024-11-14 03:58:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1683 states have (on average 1.1746880570409983) internal successors, (1977), 1684 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 03:58:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 1977 transitions. [2024-11-14 03:58:23,471 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 1977 transitions. Word has length 67 [2024-11-14 03:58:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:23,471 INFO L471 AbstractCegarLoop]: Abstraction has 1685 states and 1977 transitions. [2024-11-14 03:58:23,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 35 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 03:58:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 1977 transitions. [2024-11-14 03:58:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 03:58:23,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:23,474 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:23,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:58:23,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:23,675 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:23,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash -483634869, now seen corresponding path program 17 times [2024-11-14 03:58:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:23,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134370028] [2024-11-14 03:58:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:24,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134370028] [2024-11-14 03:58:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134370028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731838990] [2024-11-14 03:58:24,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:24,537 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:24,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:58:24,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 03:58:24,934 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:24,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-14 03:58:24,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:25,226 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 03:58:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:25,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:25,409 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 15 treesize of output 13 [2024-11-14 03:58:25,415 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 16 treesize of output 12 [2024-11-14 03:58:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731838990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474566359] [2024-11-14 03:58:25,518 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:25,518 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:25,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:25,519 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:25,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:25,904 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:26,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56434#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:58:26,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:26,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:26,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2024-11-14 03:58:26,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735274092] [2024-11-14 03:58:26,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:26,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 03:58:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 03:58:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:58:26,908 INFO L87 Difference]: Start difference. First operand 1685 states and 1977 transitions. Second operand has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:58:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:28,628 INFO L93 Difference]: Finished difference Result 2207 states and 2574 transitions. [2024-11-14 03:58:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 03:58:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 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 69 [2024-11-14 03:58:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:28,632 INFO L225 Difference]: With dead ends: 2207 [2024-11-14 03:58:28,632 INFO L226 Difference]: Without dead ends: 1995 [2024-11-14 03:58:28,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=320, Invalid=5380, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:58:28,633 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:28,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 793 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:58:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2024-11-14 03:58:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1942. [2024-11-14 03:58:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1940 states have (on average 1.177319587628866) internal successors, (2284), 1941 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states 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 03:58:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2284 transitions. [2024-11-14 03:58:28,653 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2284 transitions. Word has length 69 [2024-11-14 03:58:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:28,653 INFO L471 AbstractCegarLoop]: Abstraction has 1942 states and 2284 transitions. [2024-11-14 03:58:28,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:58:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2284 transitions. [2024-11-14 03:58:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 03:58:28,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:28,656 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:28,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:58:28,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:28,856 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:28,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:28,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1866741983, now seen corresponding path program 18 times [2024-11-14 03:58:28,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:28,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837393945] [2024-11-14 03:58:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 64 proven. 226 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:30,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:30,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837393945] [2024-11-14 03:58:30,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837393945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:30,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303226384] [2024-11-14 03:58:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:58:30,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:30,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:30,063 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:58:30,318 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:58:30,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:30,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-14 03:58:30,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:30,334 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 03:58:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:30,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:32,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303226384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:32,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541781593] [2024-11-14 03:58:32,145 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:32,145 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:32,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:32,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:32,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:32,534 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:33,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61121#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:58:33,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:33,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:33,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 62 [2024-11-14 03:58:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205574178] [2024-11-14 03:58:33,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:33,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 03:58:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 03:58:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=5081, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:58:33,684 INFO L87 Difference]: Start difference. First operand 1942 states and 2284 transitions. Second operand has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 63 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 03:58:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:35,304 INFO L93 Difference]: Finished difference Result 2112 states and 2471 transitions. [2024-11-14 03:58:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:58:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 63 states have internal predecessors, (176), 0 states have call successors, (0), 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 71 [2024-11-14 03:58:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:35,312 INFO L225 Difference]: With dead ends: 2112 [2024-11-14 03:58:35,312 INFO L226 Difference]: Without dead ends: 2112 [2024-11-14 03:58:35,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=807, Invalid=7025, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 03:58:35,314 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 121 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:35,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 611 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:58:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2024-11-14 03:58:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1982. [2024-11-14 03:58:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1980 states have (on average 1.1782828282828284) internal successors, (2333), 1981 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states 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 03:58:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2333 transitions. [2024-11-14 03:58:35,348 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2333 transitions. Word has length 71 [2024-11-14 03:58:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:35,349 INFO L471 AbstractCegarLoop]: Abstraction has 1982 states and 2333 transitions. [2024-11-14 03:58:35,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 63 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 03:58:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2333 transitions. [2024-11-14 03:58:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 03:58:35,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:35,350 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:35,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 03:58:35,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 03:58:35,551 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 03:58:35,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1828974529, now seen corresponding path program 10 times [2024-11-14 03:58:35,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:35,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939666484] [2024-11-14 03:58:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 6 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:36,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939666484] [2024-11-14 03:58:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939666484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633244159] [2024-11-14 03:58:36,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:58:36,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:36,563 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:36,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 03:58:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:36,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 03:58:36,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:36,780 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 03:58:37,053 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 03:58:37,095 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 03:58:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 41 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:37,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:37,603 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1265) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 03:58:37,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:37,610 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 03:58:37,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:58:37,619 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 03:58:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 11 proven. 155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633244159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100130275] [2024-11-14 03:58:37,788 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:58:37,788 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:37,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:37,789 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:37,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:38,317 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:39,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65253#true' at error location [2024-11-14 03:58:39,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:39,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:39,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 19] total 44 [2024-11-14 03:58:39,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357946980] [2024-11-14 03:58:39,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:39,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 03:58:39,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 03:58:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3032, Unknown=1, NotChecked=110, Total=3306 [2024-11-14 03:58:39,535 INFO L87 Difference]: Start difference. First operand 1982 states and 2333 transitions. Second operand has 45 states, 45 states have (on average 3.466666666666667) internal successors, (156), 44 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 03:58:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:41,039 INFO L93 Difference]: Finished difference Result 4530 states and 5296 transitions. [2024-11-14 03:58:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:58:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.466666666666667) internal successors, (156), 44 states have internal predecessors, (156), 0 states have call successors, (0), 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 72 [2024-11-14 03:58:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:41,044 INFO L225 Difference]: With dead ends: 4530 [2024-11-14 03:58:41,044 INFO L226 Difference]: Without dead ends: 2465 [2024-11-14 03:58:41,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=237, Invalid=4736, Unknown=1, NotChecked=138, Total=5112 [2024-11-14 03:58:41,046 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:41,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 661 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1882 Invalid, 0 Unknown, 141 Unchecked, 1.0s Time] [2024-11-14 03:58:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2024-11-14 03:58:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2057. [2024-11-14 03:58:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2055 states have (on average 1.1785888077858881) internal successors, (2422), 2056 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states 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 03:58:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2422 transitions. [2024-11-14 03:58:41,074 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2422 transitions. Word has length 72 [2024-11-14 03:58:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:41,074 INFO L471 AbstractCegarLoop]: Abstraction has 2057 states and 2422 transitions. [2024-11-14 03:58:41,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.466666666666667) internal successors, (156), 44 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 03:58:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2422 transitions. [2024-11-14 03:58:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 03:58:41,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:41,076 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:41,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:41,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 03:58:41,277 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 03:58:41,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash -465882877, now seen corresponding path program 11 times [2024-11-14 03:58:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489929268] [2024-11-14 03:58:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:41,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489929268] [2024-11-14 03:58:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489929268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145209063] [2024-11-14 03:58:41,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:41,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:41,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:41,872 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:41,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:58:42,129 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:58:42,129 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:42,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 03:58:42,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:42,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:43,068 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 03:58:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145209063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:43,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118597902] [2024-11-14 03:58:43,211 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:58:43,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:43,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:43,212 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:43,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:43,676 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:44,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72833#(and (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:58:44,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:44,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:44,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2024-11-14 03:58:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97909905] [2024-11-14 03:58:44,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:44,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:58:44,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:58:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 03:58:44,725 INFO L87 Difference]: Start difference. First operand 2057 states and 2422 transitions. Second operand has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 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 03:58:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:45,461 INFO L93 Difference]: Finished difference Result 2604 states and 3058 transitions. [2024-11-14 03:58:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:58:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 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 74 [2024-11-14 03:58:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:45,467 INFO L225 Difference]: With dead ends: 2604 [2024-11-14 03:58:45,468 INFO L226 Difference]: Without dead ends: 2604 [2024-11-14 03:58:45,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=342, Invalid=2964, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:58:45,469 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:45,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 479 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2024-11-14 03:58:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2332. [2024-11-14 03:58:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2330 states have (on average 1.1781115879828326) internal successors, (2745), 2331 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states 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 03:58:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2745 transitions. [2024-11-14 03:58:45,507 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2745 transitions. Word has length 74 [2024-11-14 03:58:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:45,508 INFO L471 AbstractCegarLoop]: Abstraction has 2332 states and 2745 transitions. [2024-11-14 03:58:45,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 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 03:58:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2745 transitions. [2024-11-14 03:58:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 03:58:45,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:45,510 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:45,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:45,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 03:58:45,711 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:45,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1276964890, now seen corresponding path program 19 times [2024-11-14 03:58:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:45,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149277694] [2024-11-14 03:58:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:46,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:46,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149277694] [2024-11-14 03:58:46,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149277694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:46,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701972117] [2024-11-14 03:58:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:58:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:46,911 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:46,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 03:58:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:47,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-14 03:58:47,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:47,524 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 03:58:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:47,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:47,770 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 15 treesize of output 13 [2024-11-14 03:58:47,772 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 16 treesize of output 12 [2024-11-14 03:58:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701972117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996406991] [2024-11-14 03:58:47,900 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:47,900 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:47,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:47,900 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:47,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:48,310 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:49,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78276#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:58:49,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:49,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2024-11-14 03:58:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460627645] [2024-11-14 03:58:49,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:49,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 03:58:49,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 03:58:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3118, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:58:49,603 INFO L87 Difference]: Start difference. First operand 2332 states and 2745 transitions. Second operand has 46 states, 46 states have (on average 2.4347826086956523) internal successors, (112), 46 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 03:58:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:52,205 INFO L93 Difference]: Finished difference Result 3020 states and 3536 transitions. [2024-11-14 03:58:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 03:58:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4347826086956523) internal successors, (112), 46 states have internal predecessors, (112), 0 states have call successors, (0), 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 75 [2024-11-14 03:58:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:52,210 INFO L225 Difference]: With dead ends: 3020 [2024-11-14 03:58:52,210 INFO L226 Difference]: Without dead ends: 2729 [2024-11-14 03:58:52,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=343, Invalid=6137, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 03:58:52,212 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:52,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 978 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:58:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2024-11-14 03:58:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2660. [2024-11-14 03:58:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2658 states have (on average 1.18058690744921) internal successors, (3138), 2659 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 03:58:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 3138 transitions. [2024-11-14 03:58:52,244 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 3138 transitions. Word has length 75 [2024-11-14 03:58:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:52,244 INFO L471 AbstractCegarLoop]: Abstraction has 2660 states and 3138 transitions. [2024-11-14 03:58:52,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4347826086956523) internal successors, (112), 46 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 03:58:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 3138 transitions. [2024-11-14 03:58:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 03:58:52,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:52,247 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:52,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 03:58:52,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 03:58:52,448 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:52,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash 733760828, now seen corresponding path program 20 times [2024-11-14 03:58:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:52,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187542587] [2024-11-14 03:58:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 81 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:53,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187542587] [2024-11-14 03:58:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187542587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872312895] [2024-11-14 03:58:53,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:53,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:53,656 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:53,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 03:58:54,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:58:54,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:54,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-14 03:58:54,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:54,830 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 03:58:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 100 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:54,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:55,176 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 6 treesize of output 4 [2024-11-14 03:58:55,909 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 03:58:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 100 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:58:56,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872312895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335319626] [2024-11-14 03:58:56,238 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:58:56,238 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:56,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:56,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:56,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:56,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:57,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84538#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:58:57,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:57,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 67 [2024-11-14 03:58:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098661126] [2024-11-14 03:58:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:57,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 03:58:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 03:58:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=5450, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 03:58:57,971 INFO L87 Difference]: Start difference. First operand 2660 states and 3138 transitions. Second operand has 68 states, 67 states have (on average 3.029850746268657) internal successors, (203), 68 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 03:58:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:59,023 INFO L93 Difference]: Finished difference Result 2877 states and 3376 transitions. [2024-11-14 03:58:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:58:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.029850746268657) internal successors, (203), 68 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 77 [2024-11-14 03:58:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:59,026 INFO L225 Difference]: With dead ends: 2877 [2024-11-14 03:58:59,026 INFO L226 Difference]: Without dead ends: 2877 [2024-11-14 03:58:59,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 166 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1005, Invalid=7551, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 03:58:59,027 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 218 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:59,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 482 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2024-11-14 03:58:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2708. [2024-11-14 03:58:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 2706 states have (on average 1.1814486326681448) internal successors, (3197), 2707 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states 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 03:58:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 3197 transitions. [2024-11-14 03:58:59,049 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 3197 transitions. Word has length 77 [2024-11-14 03:58:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:59,049 INFO L471 AbstractCegarLoop]: Abstraction has 2708 states and 3197 transitions. [2024-11-14 03:58:59,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.029850746268657) internal successors, (203), 68 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 03:58:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 3197 transitions. [2024-11-14 03:58:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 03:58:59,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:59,052 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:59,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 03:58:59,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 03:58:59,253 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:58:59,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash 816648321, now seen corresponding path program 21 times [2024-11-14 03:58:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761831049] [2024-11-14 03:58:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:59,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:00,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:00,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761831049] [2024-11-14 03:59:00,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761831049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:00,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117213178] [2024-11-14 03:59:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:59:00,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:00,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:00,518 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:00,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 03:59:00,939 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:59:00,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:59:00,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-14 03:59:00,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:01,388 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 03:59:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:01,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:01,637 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 15 treesize of output 13 [2024-11-14 03:59:01,639 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 16 treesize of output 12 [2024-11-14 03:59:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:01,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117213178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:01,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068677428] [2024-11-14 03:59:01,757 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:59:01,757 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:01,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:01,757 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:01,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:02,154 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:03,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90691#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:59:03,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:03,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2024-11-14 03:59:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118087786] [2024-11-14 03:59:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:03,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:59:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:59:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3712, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:59:03,646 INFO L87 Difference]: Start difference. First operand 2708 states and 3197 transitions. Second operand has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 03:59:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:06,262 INFO L93 Difference]: Finished difference Result 3455 states and 4058 transitions. [2024-11-14 03:59:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 03:59:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 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 81 [2024-11-14 03:59:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:06,267 INFO L225 Difference]: With dead ends: 3455 [2024-11-14 03:59:06,267 INFO L226 Difference]: Without dead ends: 3140 [2024-11-14 03:59:06,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=351, Invalid=7305, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 03:59:06,268 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 3280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:06,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1168 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3280 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 03:59:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2024-11-14 03:59:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3064. [2024-11-14 03:59:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3062 states have (on average 1.1838667537557153) internal successors, (3625), 3063 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states 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 03:59:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 3625 transitions. [2024-11-14 03:59:06,292 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 3625 transitions. Word has length 81 [2024-11-14 03:59:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:06,292 INFO L471 AbstractCegarLoop]: Abstraction has 3064 states and 3625 transitions. [2024-11-14 03:59:06,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 03:59:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 3625 transitions. [2024-11-14 03:59:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 03:59:06,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:06,294 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:06,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 03:59:06,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:06,494 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:59:06,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1128035671, now seen corresponding path program 22 times [2024-11-14 03:59:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:06,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449628195] [2024-11-14 03:59:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 100 proven. 320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:07,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:07,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449628195] [2024-11-14 03:59:07,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449628195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:07,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364629147] [2024-11-14 03:59:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:59:07,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:07,939 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:07,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 03:59:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:08,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 03:59:08,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:08,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:09,780 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 03:59:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364629147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118207328] [2024-11-14 03:59:10,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:59:10,183 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:10,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:10,183 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:10,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:10,593 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:11,772 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97827#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:59:11,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:11,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:11,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 60 [2024-11-14 03:59:11,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424522696] [2024-11-14 03:59:11,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:11,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 03:59:11,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 03:59:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=4630, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 03:59:11,774 INFO L87 Difference]: Start difference. First operand 3064 states and 3625 transitions. Second operand has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:59:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:13,879 INFO L93 Difference]: Finished difference Result 3292 states and 3874 transitions. [2024-11-14 03:59:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:59:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-14 03:59:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:13,885 INFO L225 Difference]: With dead ends: 3292 [2024-11-14 03:59:13,885 INFO L226 Difference]: Without dead ends: 3292 [2024-11-14 03:59:13,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 192 SyntacticMatches, 13 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=701, Invalid=6781, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 03:59:13,886 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 231 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:13,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 719 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:59:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3292 states. [2024-11-14 03:59:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 3112. [2024-11-14 03:59:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3110 states have (on average 1.184565916398714) internal successors, (3684), 3111 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states 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 03:59:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 3684 transitions. [2024-11-14 03:59:13,916 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 3684 transitions. Word has length 83 [2024-11-14 03:59:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:13,916 INFO L471 AbstractCegarLoop]: Abstraction has 3112 states and 3684 transitions. [2024-11-14 03:59:13,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:59:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 3684 transitions. [2024-11-14 03:59:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 03:59:13,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:13,918 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:13,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 03:59:14,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:14,119 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 03:59:14,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1557761318, now seen corresponding path program 12 times [2024-11-14 03:59:14,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:14,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294672248] [2024-11-14 03:59:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:15,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294672248] [2024-11-14 03:59:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294672248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112365271] [2024-11-14 03:59:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:59:15,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:15,219 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:15,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 03:59:15,516 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:59:15,517 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:59:15,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 03:59:15,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:16,001 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 03:59:16,071 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-14 03:59:16,071 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 21 treesize of output 20 [2024-11-14 03:59:17,739 INFO L349 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2024-11-14 03:59:17,739 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 3 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 03:59:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:17,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:18,380 INFO L349 Elim1Store]: treesize reduction 65, result has 31.6 percent of original size [2024-11-14 03:59:18,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 213 [2024-11-14 03:59:18,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:59:18,397 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 183 treesize of output 175 [2024-11-14 03:59:18,454 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 03:59:18,454 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 20 treesize of output 11 [2024-11-14 03:59:18,457 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 14 treesize of output 12 [2024-11-14 03:59:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112365271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355675189] [2024-11-14 03:59:18,945 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:59:18,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:18,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:18,946 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:18,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:19,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:21,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104828#(and (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:59:21,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:21,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:21,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-11-14 03:59:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468653860] [2024-11-14 03:59:21,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:21,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 03:59:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 03:59:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5900, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 03:59:21,249 INFO L87 Difference]: Start difference. First operand 3112 states and 3684 transitions. Second operand has 64 states, 64 states have (on average 3.234375) internal successors, (207), 63 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 03:59:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:24,932 INFO L93 Difference]: Finished difference Result 5920 states and 6969 transitions. [2024-11-14 03:59:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 03:59:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.234375) internal successors, (207), 63 states have internal predecessors, (207), 0 states have call successors, (0), 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 03:59:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:24,944 INFO L225 Difference]: With dead ends: 5920 [2024-11-14 03:59:24,944 INFO L226 Difference]: Without dead ends: 5833 [2024-11-14 03:59:24,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=448, Invalid=10264, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 03:59:24,945 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 3713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:24,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1135 Invalid, 3713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 03:59:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2024-11-14 03:59:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5446. [2024-11-14 03:59:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5444 states have (on average 1.1836884643644379) internal successors, (6444), 5445 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states 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 03:59:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 6444 transitions. [2024-11-14 03:59:25,011 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 6444 transitions. Word has length 83 [2024-11-14 03:59:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:25,011 INFO L471 AbstractCegarLoop]: Abstraction has 5446 states and 6444 transitions. [2024-11-14 03:59:25,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.234375) internal successors, (207), 63 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 03:59:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 6444 transitions. [2024-11-14 03:59:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-14 03:59:25,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:25,016 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:25,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 03:59:25,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-14 03:59:25,217 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 03:59:25,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 921242082, now seen corresponding path program 13 times [2024-11-14 03:59:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:25,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253736509] [2024-11-14 03:59:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:25,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:25,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253736509] [2024-11-14 03:59:25,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253736509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:25,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442614073] [2024-11-14 03:59:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:59:25,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:25,726 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:25,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 03:59:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:25,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 03:59:25,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:26,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:27,055 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 03:59:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:27,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442614073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029362119] [2024-11-14 03:59:27,226 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:59:27,226 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:27,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:27,227 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:27,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:27,701 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:28,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '116803#(and (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 03:59:28,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:28,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:28,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2024-11-14 03:59:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704854550] [2024-11-14 03:59:28,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:28,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 03:59:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 03:59:28,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:59:28,781 INFO L87 Difference]: Start difference. First operand 5446 states and 6444 transitions. Second operand has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 03:59:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:30,108 INFO L93 Difference]: Finished difference Result 6196 states and 7324 transitions. [2024-11-14 03:59:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:59:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 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 85 [2024-11-14 03:59:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:30,121 INFO L225 Difference]: With dead ends: 6196 [2024-11-14 03:59:30,121 INFO L226 Difference]: Without dead ends: 6196 [2024-11-14 03:59:30,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 209 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=285, Invalid=2795, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:59:30,122 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:30,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 826 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:59:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2024-11-14 03:59:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5823. [2024-11-14 03:59:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5823 states, 5821 states have (on average 1.1836454217488404) internal successors, (6890), 5822 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states 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 03:59:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5823 states to 5823 states and 6890 transitions. [2024-11-14 03:59:30,200 INFO L78 Accepts]: Start accepts. Automaton has 5823 states and 6890 transitions. Word has length 85 [2024-11-14 03:59:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:30,201 INFO L471 AbstractCegarLoop]: Abstraction has 5823 states and 6890 transitions. [2024-11-14 03:59:30,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 03:59:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5823 states and 6890 transitions. [2024-11-14 03:59:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 03:59:30,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:30,206 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:59:30,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-14 03:59:30,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-14 03:59:30,406 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:59:30,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1118457060, now seen corresponding path program 23 times [2024-11-14 03:59:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534553558] [2024-11-14 03:59:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 37 proven. 432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:31,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534553558] [2024-11-14 03:59:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534553558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528758158] [2024-11-14 03:59:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:59:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:31,705 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 03:59:32,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 03:59:32,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:59:32,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-14 03:59:32,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:32,732 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 14 treesize of output 10 [2024-11-14 03:59:48,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:59:48,096 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 32 treesize of output 29 [2024-11-14 03:59:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 121 proven. 348 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:48,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:50,682 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 13 treesize of output 11 [2024-11-14 03:59:50,687 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 22 treesize of output 20 [2024-11-14 03:59:50,693 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 03:59:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 121 proven. 348 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:59:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528758158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769529532] [2024-11-14 03:59:51,056 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 03:59:51,056 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:51,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:51,056 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:51,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:51,495 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:52,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '129437#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 03:59:52,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:52,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:52,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 82 [2024-11-14 03:59:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814455884] [2024-11-14 03:59:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:52,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 03:59:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 03:59:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=7877, Unknown=1, NotChecked=0, Total=8556 [2024-11-14 03:59:52,921 INFO L87 Difference]: Start difference. First operand 5823 states and 6890 transitions. Second operand has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 04:00:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:47,424 INFO L93 Difference]: Finished difference Result 7489 states and 8794 transitions. [2024-11-14 04:00:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 04:00:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 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 04:00:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:47,435 INFO L225 Difference]: With dead ends: 7489 [2024-11-14 04:00:47,435 INFO L226 Difference]: Without dead ends: 7136 [2024-11-14 04:00:47,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 187 SyntacticMatches, 13 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5829 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=1786, Invalid=14983, Unknown=1, NotChecked=0, Total=16770 [2024-11-14 04:00:47,437 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 656 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3119 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:47,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 867 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3119 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 04:00:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2024-11-14 04:00:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 6665. [2024-11-14 04:00:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6663 states have (on average 1.1867026864775627) internal successors, (7907), 6664 states have internal predecessors, (7907), 0 states have call successors, (0), 0 states 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 04:00:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7907 transitions. [2024-11-14 04:00:47,522 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7907 transitions. Word has length 87 [2024-11-14 04:00:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:47,522 INFO L471 AbstractCegarLoop]: Abstraction has 6665 states and 7907 transitions. [2024-11-14 04:00:47,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 04:00:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7907 transitions. [2024-11-14 04:00:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 04:00:47,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:47,527 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:00:47,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 04:00:47,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-14 04:00:47,728 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 04:00:47,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash 638691585, now seen corresponding path program 2 times [2024-11-14 04:00:47,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:47,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113164068] [2024-11-14 04:00:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:47,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 73 proven. 183 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:00:48,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113164068] [2024-11-14 04:00:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113164068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:00:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011990157] [2024-11-14 04:00:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:00:48,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:00:48,582 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:00:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 04:00:48,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:00:48,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:00:48,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 04:00:48,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:00:49,004 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 04:00:49,009 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 04:00:49,013 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 04:00:49,247 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 14 treesize of output 10 [2024-11-14 04:00:49,308 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 19 treesize of output 14 [2024-11-14 04:00:53,710 INFO L349 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2024-11-14 04:00:53,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 50 [2024-11-14 04:00:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 25 proven. 221 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:00:53,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:00:56,140 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_234| Int) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (v_ArrVal_1783 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1783))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_234|))) (or (not (= .cse0 (select (select .cse1 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_234| 0) (< (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_234| 1) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_234|) (= .cse0 0))))) is different from false [2024-11-14 04:00:56,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:00:56,153 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 62 treesize of output 40 [2024-11-14 04:00:56,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:00:56,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 114 [2024-11-14 04:00:56,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:00:56,198 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 64 treesize of output 62 [2024-11-14 04:00:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 25 proven. 231 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:00:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011990157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:00:56,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870884353] [2024-11-14 04:00:56,944 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 04:00:56,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:00:56,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:00:56,945 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:00:56,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:00:57,705 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:02,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '144264#(exists ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_245| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.base_245| Int)) (and (<= 1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_245|) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrspn_~sc1~0#1.base_245|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_245|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrspn_~s~0#1.base_606| Int) (|v_ULTIMATE.start_cstrspn_~s~0#1.offset_605| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 0)) (<= 0 |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) (<= (+ |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605| 1) (select |#length| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|)) (or (and (= (+ (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 256) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 256)) (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 256))) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 256)) (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_605|) 127))) (= (select |#valid| |v_ULTIMATE.start_cstrspn_~s~0#1.base_606|) 1)))))' at error location [2024-11-14 04:01:02,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:02,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:02,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 59 [2024-11-14 04:01:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535642139] [2024-11-14 04:01:02,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:02,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 04:01:02,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 04:01:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=5165, Unknown=4, NotChecked=146, Total=5700 [2024-11-14 04:01:02,258 INFO L87 Difference]: Start difference. First operand 6665 states and 7907 transitions. Second operand has 60 states, 60 states have (on average 4.2) internal successors, (252), 59 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 04:01:25,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:01:42,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:01:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:46,228 INFO L93 Difference]: Finished difference Result 6617 states and 7823 transitions. [2024-11-14 04:01:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-14 04:01:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.2) internal successors, (252), 59 states have internal predecessors, (252), 0 states have call successors, (0), 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 89 [2024-11-14 04:01:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:46,230 INFO L225 Difference]: With dead ends: 6617 [2024-11-14 04:01:46,230 INFO L226 Difference]: Without dead ends: 1379 [2024-11-14 04:01:46,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=1685, Invalid=15344, Unknown=5, NotChecked=258, Total=17292 [2024-11-14 04:01:46,231 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 288 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:46,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 441 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1768 Invalid, 1 Unknown, 183 Unchecked, 5.5s Time] [2024-11-14 04:01:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2024-11-14 04:01:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 623. [2024-11-14 04:01:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.167202572347267) internal successors, (726), 622 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 04:01:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 726 transitions. [2024-11-14 04:01:46,241 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 726 transitions. Word has length 89 [2024-11-14 04:01:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:46,241 INFO L471 AbstractCegarLoop]: Abstraction has 623 states and 726 transitions. [2024-11-14 04:01:46,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.2) internal successors, (252), 59 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 04:01:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 726 transitions. [2024-11-14 04:01:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 04:01:46,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:46,242 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:46,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 04:01:46,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-14 04:01:46,443 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:01:46,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash 573593527, now seen corresponding path program 24 times [2024-11-14 04:01:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:46,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202914649] [2024-11-14 04:01:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:48,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202914649] [2024-11-14 04:01:48,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202914649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840259175] [2024-11-14 04:01:48,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:01:48,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:48,217 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:48,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 04:01:48,629 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:01:48,629 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:01:48,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-14 04:01:48,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:49,185 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 04:01:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:49,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:49,466 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 15 treesize of output 13 [2024-11-14 04:01:49,469 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 16 treesize of output 12 [2024-11-14 04:01:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:49,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840259175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:49,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935473747] [2024-11-14 04:01:49,680 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:01:49,680 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:49,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:49,680 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:49,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:50,028 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:51,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152240#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:01:51,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:51,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2024-11-14 04:01:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893706082] [2024-11-14 04:01:51,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:51,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 04:01:51,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 04:01:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4482, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:01:51,411 INFO L87 Difference]: Start difference. First operand 623 states and 726 transitions. Second operand has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:53,905 INFO L93 Difference]: Finished difference Result 1136 states and 1316 transitions. [2024-11-14 04:01:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:01:53,906 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 04:01:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:53,906 INFO L225 Difference]: With dead ends: 1136 [2024-11-14 04:01:53,906 INFO L226 Difference]: Without dead ends: 641 [2024-11-14 04:01:53,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=391, Invalid=9115, Unknown=0, NotChecked=0, Total=9506 [2024-11-14 04:01:53,907 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 189 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:53,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 899 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:01:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2024-11-14 04:01:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 635. [2024-11-14 04:01:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.16403785488959) internal successors, (738), 634 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 04:01:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 738 transitions. [2024-11-14 04:01:53,919 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 738 transitions. Word has length 93 [2024-11-14 04:01:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:53,920 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 738 transitions. [2024-11-14 04:01:53,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 738 transitions. [2024-11-14 04:01:53,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 04:01:53,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:53,922 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:53,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 04:01:54,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-14 04:01:54,122 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:01:54,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1716595597, now seen corresponding path program 25 times [2024-11-14 04:01:54,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:54,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615458753] [2024-11-14 04:01:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 144 proven. 430 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:55,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615458753] [2024-11-14 04:01:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615458753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320165689] [2024-11-14 04:01:55,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:01:55,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:55,931 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:55,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 04:01:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:56,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-14 04:01:56,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 169 proven. 405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:57,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:58,007 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 04:01:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 169 proven. 405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:01:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320165689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890850036] [2024-11-14 04:01:58,486 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:01:58,486 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:58,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:58,486 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:58,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:58,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:00,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '154716#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:02:00,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:00,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 68 [2024-11-14 04:02:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143625245] [2024-11-14 04:02:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:00,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 04:02:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 04:02:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=6180, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 04:02:00,551 INFO L87 Difference]: Start difference. First operand 635 states and 738 transitions. Second operand has 69 states, 68 states have (on average 2.911764705882353) internal successors, (198), 69 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 04:02:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:02,434 INFO L93 Difference]: Finished difference Result 774 states and 889 transitions. [2024-11-14 04:02:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 04:02:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.911764705882353) internal successors, (198), 69 states have internal predecessors, (198), 0 states have call successors, (0), 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 95 [2024-11-14 04:02:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:02,435 INFO L225 Difference]: With dead ends: 774 [2024-11-14 04:02:02,435 INFO L226 Difference]: Without dead ends: 774 [2024-11-14 04:02:02,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 219 SyntacticMatches, 15 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=892, Invalid=9008, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:02:02,436 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 281 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:02,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 706 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:02:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2024-11-14 04:02:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 663. [2024-11-14 04:02:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.1661631419939578) internal successors, (772), 662 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 04:02:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 772 transitions. [2024-11-14 04:02:02,443 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 772 transitions. Word has length 95 [2024-11-14 04:02:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:02,443 INFO L471 AbstractCegarLoop]: Abstraction has 663 states and 772 transitions. [2024-11-14 04:02:02,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.911764705882353) internal successors, (198), 69 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 04:02:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 772 transitions. [2024-11-14 04:02:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 04:02:02,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:02,444 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:02,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 04:02:02,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-14 04:02:02,645 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:02,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1041784402, now seen corresponding path program 26 times [2024-11-14 04:02:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:02,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515006272] [2024-11-14 04:02:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:02,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 43 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:04,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515006272] [2024-11-14 04:02:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515006272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551489066] [2024-11-14 04:02:04,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:02:04,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:04,123 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:04,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 04:02:05,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 04:02:05,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:05,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-14 04:02:05,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:05,633 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 04:02:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 43 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:05,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:05,937 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 15 treesize of output 13 [2024-11-14 04:02:05,939 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 16 treesize of output 12 [2024-11-14 04:02:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 43 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551489066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:06,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911042134] [2024-11-14 04:02:06,075 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:06,075 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:06,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:06,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:06,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:06,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:07,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156847#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:02:07,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:07,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:07,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2024-11-14 04:02:07,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184400767] [2024-11-14 04:02:07,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:07,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 04:02:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 04:02:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4602, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 04:02:07,734 INFO L87 Difference]: Start difference. First operand 663 states and 772 transitions. Second operand has 58 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 04:02:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:10,850 INFO L93 Difference]: Finished difference Result 1210 states and 1402 transitions. [2024-11-14 04:02:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 04:02:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 0 states have call successors, (0), 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 99 [2024-11-14 04:02:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:10,852 INFO L225 Difference]: With dead ends: 1210 [2024-11-14 04:02:10,852 INFO L226 Difference]: Without dead ends: 681 [2024-11-14 04:02:10,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=435, Invalid=9665, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 04:02:10,852 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 3807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:10,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1201 Invalid, 3807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3793 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:02:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2024-11-14 04:02:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2024-11-14 04:02:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.1632047477744807) internal successors, (784), 674 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 04:02:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 784 transitions. [2024-11-14 04:02:10,860 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 784 transitions. Word has length 99 [2024-11-14 04:02:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:10,860 INFO L471 AbstractCegarLoop]: Abstraction has 675 states and 784 transitions. [2024-11-14 04:02:10,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.4827586206896552) internal successors, (144), 58 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 04:02:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 784 transitions. [2024-11-14 04:02:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-14 04:02:10,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:10,861 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:10,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 04:02:11,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:11,062 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:11,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash -444302936, now seen corresponding path program 27 times [2024-11-14 04:02:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827165809] [2024-11-14 04:02:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:11,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 169 proven. 491 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:12,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827165809] [2024-11-14 04:02:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827165809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840880417] [2024-11-14 04:02:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:02:12,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:12,633 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:12,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 04:02:13,168 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:02:13,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:13,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-14 04:02:13,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:13,183 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 04:02:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 196 proven. 464 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:14,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 196 proven. 464 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:16,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840880417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:16,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1740418066] [2024-11-14 04:02:16,413 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:16,413 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:16,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:16,413 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:16,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:16,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:18,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159495#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:02:18,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:18,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:18,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 87 [2024-11-14 04:02:18,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928129730] [2024-11-14 04:02:18,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:18,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-14 04:02:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-14 04:02:18,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=9353, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:02:18,428 INFO L87 Difference]: Start difference. First operand 675 states and 784 transitions. Second operand has 89 states, 88 states have (on average 2.7954545454545454) internal successors, (246), 88 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 04:02:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:21,067 INFO L93 Difference]: Finished difference Result 820 states and 941 transitions. [2024-11-14 04:02:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 04:02:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.7954545454545454) internal successors, (246), 88 states have internal predecessors, (246), 0 states have call successors, (0), 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 04:02:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:21,068 INFO L225 Difference]: With dead ends: 820 [2024-11-14 04:02:21,068 INFO L226 Difference]: Without dead ends: 820 [2024-11-14 04:02:21,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5371 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1460, Invalid=13060, Unknown=0, NotChecked=0, Total=14520 [2024-11-14 04:02:21,069 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 2897 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:21,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 936 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2897 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 04:02:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2024-11-14 04:02:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 703. [2024-11-14 04:02:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.1652421652421652) internal successors, (818), 702 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 04:02:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 818 transitions. [2024-11-14 04:02:21,080 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 818 transitions. Word has length 101 [2024-11-14 04:02:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:21,081 INFO L471 AbstractCegarLoop]: Abstraction has 703 states and 818 transitions. [2024-11-14 04:02:21,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.7954545454545454) internal successors, (246), 88 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 04:02:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 818 transitions. [2024-11-14 04:02:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 04:02:21,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:21,082 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:21,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 04:02:21,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:21,283 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:21,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 946939629, now seen corresponding path program 28 times [2024-11-14 04:02:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291658104] [2024-11-14 04:02:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:22,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291658104] [2024-11-14 04:02:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291658104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:22,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119928234] [2024-11-14 04:02:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:02:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:22,900 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:22,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 04:02:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:23,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-11-14 04:02:23,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:23,879 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 04:02:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:24,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:24,184 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 15 treesize of output 13 [2024-11-14 04:02:24,186 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 16 treesize of output 12 [2024-11-14 04:02:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119928234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135612962] [2024-11-14 04:02:24,333 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:24,333 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:24,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:24,333 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:24,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:24,710 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:26,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161753#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:02:26,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:26,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:26,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 61 [2024-11-14 04:02:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775070352] [2024-11-14 04:02:26,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:26,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 04:02:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 04:02:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=5018, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 04:02:26,262 INFO L87 Difference]: Start difference. First operand 703 states and 818 transitions. Second operand has 61 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 04:02:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:30,352 INFO L93 Difference]: Finished difference Result 1284 states and 1488 transitions. [2024-11-14 04:02:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 04:02:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 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 04:02:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:30,353 INFO L225 Difference]: With dead ends: 1284 [2024-11-14 04:02:30,353 INFO L226 Difference]: Without dead ends: 721 [2024-11-14 04:02:30,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2595 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=458, Invalid=10672, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 04:02:30,354 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 212 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:30,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1374 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 04:02:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2024-11-14 04:02:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 715. [2024-11-14 04:02:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.1624649859943978) internal successors, (830), 714 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 04:02:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 830 transitions. [2024-11-14 04:02:30,361 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 830 transitions. Word has length 105 [2024-11-14 04:02:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:30,362 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 830 transitions. [2024-11-14 04:02:30,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 04:02:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 830 transitions. [2024-11-14 04:02:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 04:02:30,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:30,363 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:30,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-14 04:02:30,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 04:02:30,564 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:30,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1401624125, now seen corresponding path program 29 times [2024-11-14 04:02:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:30,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437245334] [2024-11-14 04:02:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 196 proven. 556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:32,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437245334] [2024-11-14 04:02:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437245334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843808025] [2024-11-14 04:02:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:02:32,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:32,868 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:32,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 04:02:34,009 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 04:02:34,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:34,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-14 04:02:34,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 225 proven. 527 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:36,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:37,775 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 04:02:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 225 proven. 527 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843808025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:38,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953615305] [2024-11-14 04:02:38,512 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:38,512 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:38,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:38,513 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:38,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:38,916 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:40,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164559#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:02:40,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:40,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:40,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 92 [2024-11-14 04:02:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790695177] [2024-11-14 04:02:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:40,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-14 04:02:40,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-14 04:02:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1340, Invalid=10002, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 04:02:40,877 INFO L87 Difference]: Start difference. First operand 715 states and 830 transitions. Second operand has 93 states, 92 states have (on average 3.0760869565217392) 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 04:02:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:42,899 INFO L93 Difference]: Finished difference Result 866 states and 993 transitions. [2024-11-14 04:02:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:02:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.0760869565217392) 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 107 [2024-11-14 04:02:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:42,900 INFO L225 Difference]: With dead ends: 866 [2024-11-14 04:02:42,900 INFO L226 Difference]: Without dead ends: 866 [2024-11-14 04:02:42,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 233 SyntacticMatches, 17 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7195 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1838, Invalid=13912, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 04:02:42,901 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 310 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:42,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 649 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:02:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-11-14 04:02:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 743. [2024-11-14 04:02:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.1644204851752022) internal successors, (864), 742 states have internal predecessors, (864), 0 states have call successors, (0), 0 states 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 04:02:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 864 transitions. [2024-11-14 04:02:42,911 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 864 transitions. Word has length 107 [2024-11-14 04:02:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:42,911 INFO L471 AbstractCegarLoop]: Abstraction has 743 states and 864 transitions. [2024-11-14 04:02:42,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.0760869565217392) 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 04:02:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 864 transitions. [2024-11-14 04:02:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 04:02:42,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:42,912 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:42,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 04:02:43,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-14 04:02:43,113 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:43,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 858132872, now seen corresponding path program 30 times [2024-11-14 04:02:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545179906] [2024-11-14 04:02:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 49 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:45,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545179906] [2024-11-14 04:02:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545179906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339031405] [2024-11-14 04:02:45,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:02:45,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:45,074 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:45,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 04:02:45,642 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:02:45,642 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:45,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-14 04:02:45,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:46,433 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 04:02:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 49 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:46,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:46,820 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 15 treesize of output 13 [2024-11-14 04:02:46,822 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 16 treesize of output 12 [2024-11-14 04:02:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 49 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:47,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339031405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832119814] [2024-11-14 04:02:47,011 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:47,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:47,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:47,011 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:47,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:47,419 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:49,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166944#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:02:49,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:49,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:49,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2024-11-14 04:02:49,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716786862] [2024-11-14 04:02:49,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:49,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 04:02:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 04:02:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5452, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 04:02:49,129 INFO L87 Difference]: Start difference. First operand 743 states and 864 transitions. Second operand has 64 states, 64 states have (on average 2.5) internal successors, (160), 64 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 04:02:53,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:53,603 INFO L93 Difference]: Finished difference Result 1358 states and 1574 transitions. [2024-11-14 04:02:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 04:02:53,604 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.5) internal successors, (160), 64 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) Word has length 111 [2024-11-14 04:02:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:53,605 INFO L225 Difference]: With dead ends: 1358 [2024-11-14 04:02:53,605 INFO L226 Difference]: Without dead ends: 761 [2024-11-14 04:02:53,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=481, Invalid=11729, Unknown=0, NotChecked=0, Total=12210 [2024-11-14 04:02:53,606 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 226 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 4424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 4440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:53,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1299 Invalid, 4440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4424 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-14 04:02:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2024-11-14 04:02:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 755. [2024-11-14 04:02:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.1618037135278514) internal successors, (876), 754 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 04:02:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 876 transitions. [2024-11-14 04:02:53,611 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 876 transitions. Word has length 111 [2024-11-14 04:02:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:53,612 INFO L471 AbstractCegarLoop]: Abstraction has 755 states and 876 transitions. [2024-11-14 04:02:53,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.5) internal successors, (160), 64 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 04:02:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 876 transitions. [2024-11-14 04:02:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 04:02:53,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:53,613 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:53,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 04:02:53,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:53,813 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:02:53,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 172350430, now seen corresponding path program 31 times [2024-11-14 04:02:53,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:53,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327310717] [2024-11-14 04:02:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 225 proven. 625 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:55,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327310717] [2024-11-14 04:02:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327310717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748118804] [2024-11-14 04:02:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:02:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:55,855 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:55,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 04:02:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:56,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-11-14 04:02:56,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 256 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:57,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:58,719 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 04:02:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 256 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:02:59,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748118804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:59,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231577279] [2024-11-14 04:02:59,448 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:02:59,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:59,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:59,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:59,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:59,819 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:01,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169892#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:03:01,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:01,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:01,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 80 [2024-11-14 04:03:01,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216333062] [2024-11-14 04:03:01,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:01,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 04:03:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 04:03:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=8082, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 04:03:01,666 INFO L87 Difference]: Start difference. First operand 755 states and 876 transitions. Second operand has 81 states, 80 states have (on average 2.925) internal successors, (234), 81 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 04:03:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:05,012 INFO L93 Difference]: Finished difference Result 912 states and 1045 transitions. [2024-11-14 04:03:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 04:03:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.925) internal successors, (234), 81 states have internal predecessors, (234), 0 states have call successors, (0), 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 113 [2024-11-14 04:03:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:05,014 INFO L225 Difference]: With dead ends: 912 [2024-11-14 04:03:05,014 INFO L226 Difference]: Without dead ends: 912 [2024-11-14 04:03:05,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 18 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5871 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1192, Invalid=11918, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 04:03:05,015 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 334 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:05,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1126 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 04:03:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2024-11-14 04:03:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 783. [2024-11-14 04:03:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.1636828644501278) internal successors, (910), 782 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 04:03:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 910 transitions. [2024-11-14 04:03:05,023 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 910 transitions. Word has length 113 [2024-11-14 04:03:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:05,024 INFO L471 AbstractCegarLoop]: Abstraction has 783 states and 910 transitions. [2024-11-14 04:03:05,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.925) internal successors, (234), 81 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 04:03:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 910 transitions. [2024-11-14 04:03:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 04:03:05,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:05,025 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:05,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 04:03:05,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:05,225 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:03:05,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:05,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2091548195, now seen corresponding path program 32 times [2024-11-14 04:03:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:05,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3970642] [2024-11-14 04:03:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:07,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3970642] [2024-11-14 04:03:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3970642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128183778] [2024-11-14 04:03:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:03:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:07,544 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:07,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 04:03:08,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-14 04:03:08,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:03:08,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-11-14 04:03:08,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:09,932 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 04:03:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:10,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:10,361 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 15 treesize of output 13 [2024-11-14 04:03:10,363 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 16 treesize of output 12 [2024-11-14 04:03:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128183778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644753685] [2024-11-14 04:03:10,570 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:03:10,570 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:10,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:10,571 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:10,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:10,958 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:13,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172404#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:03:13,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:13,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2024-11-14 04:03:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600429852] [2024-11-14 04:03:13,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:13,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 04:03:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 04:03:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6238, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 04:03:13,007 INFO L87 Difference]: Start difference. First operand 783 states and 910 transitions. Second operand has 67 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 67 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 04:03:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:18,565 INFO L93 Difference]: Finished difference Result 1432 states and 1660 transitions. [2024-11-14 04:03:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 04:03:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 67 states have internal predecessors, (168), 0 states have call successors, (0), 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 117 [2024-11-14 04:03:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:18,567 INFO L225 Difference]: With dead ends: 1432 [2024-11-14 04:03:18,567 INFO L226 Difference]: Without dead ends: 801 [2024-11-14 04:03:18,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=471, Invalid=13335, Unknown=0, NotChecked=0, Total=13806 [2024-11-14 04:03:18,568 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 238 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 6109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 6126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:18,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1992 Invalid, 6126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6109 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 04:03:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-11-14 04:03:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 795. [2024-11-14 04:03:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.1612090680100755) internal successors, (922), 794 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 04:03:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 922 transitions. [2024-11-14 04:03:18,577 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 922 transitions. Word has length 117 [2024-11-14 04:03:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:18,577 INFO L471 AbstractCegarLoop]: Abstraction has 795 states and 922 transitions. [2024-11-14 04:03:18,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 67 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 04:03:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 922 transitions. [2024-11-14 04:03:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-14 04:03:18,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:18,579 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:18,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-14 04:03:18,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:18,780 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:03:18,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1331515399, now seen corresponding path program 33 times [2024-11-14 04:03:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:18,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118690481] [2024-11-14 04:03:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 256 proven. 698 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:21,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118690481] [2024-11-14 04:03:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118690481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98334272] [2024-11-14 04:03:21,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:03:21,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:21,448 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:21,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 04:03:22,187 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:03:22,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:03:22,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-14 04:03:22,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:22,207 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 04:03:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 289 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:23,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 289 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98334272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147987775] [2024-11-14 04:03:27,674 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:03:27,674 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:27,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:27,674 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:27,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:28,045 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:30,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175531#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:03:30,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:30,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 102 [2024-11-14 04:03:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007406547] [2024-11-14 04:03:30,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:30,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-14 04:03:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-14 04:03:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=12263, Unknown=0, NotChecked=0, Total=13806 [2024-11-14 04:03:30,395 INFO L87 Difference]: Start difference. First operand 795 states and 922 transitions. Second operand has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 103 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 04:03:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:34,375 INFO L93 Difference]: Finished difference Result 958 states and 1097 transitions. [2024-11-14 04:03:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:03:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 103 states have internal predecessors, (288), 0 states have call successors, (0), 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 04:03:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:34,376 INFO L225 Difference]: With dead ends: 958 [2024-11-14 04:03:34,377 INFO L226 Difference]: Without dead ends: 958 [2024-11-14 04:03:34,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7132 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1934, Invalid=17248, Unknown=0, NotChecked=0, Total=19182 [2024-11-14 04:03:34,378 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 487 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 3708 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 3709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:34,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 1253 Invalid, 3709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3708 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-14 04:03:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-11-14 04:03:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 823. [2024-11-14 04:03:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 1.1630170316301702) internal successors, (956), 822 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 04:03:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 956 transitions. [2024-11-14 04:03:34,387 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 956 transitions. Word has length 119 [2024-11-14 04:03:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:34,387 INFO L471 AbstractCegarLoop]: Abstraction has 823 states and 956 transitions. [2024-11-14 04:03:34,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 103 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 04:03:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 956 transitions. [2024-11-14 04:03:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 04:03:34,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:34,389 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:34,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 04:03:34,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:34,589 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:03:34,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1106889918, now seen corresponding path program 34 times [2024-11-14 04:03:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:34,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967865597] [2024-11-14 04:03:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 55 proven. 972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:37,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:37,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967865597] [2024-11-14 04:03:37,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967865597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:37,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041318325] [2024-11-14 04:03:37,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:03:37,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:37,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:37,182 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:37,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 04:03:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:37,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-14 04:03:37,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:38,734 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 04:03:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 55 proven. 972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:39,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:39,179 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 15 treesize of output 13 [2024-11-14 04:03:39,181 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 16 treesize of output 12 [2024-11-14 04:03:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 55 proven. 972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041318325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:39,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365300739] [2024-11-14 04:03:39,387 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:03:39,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:39,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:39,387 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:39,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:39,906 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:41,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '178170#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:03:41,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:41,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:41,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 70 [2024-11-14 04:03:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976045266] [2024-11-14 04:03:41,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:41,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 04:03:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 04:03:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=6722, Unknown=0, NotChecked=0, Total=6972 [2024-11-14 04:03:41,849 INFO L87 Difference]: Start difference. First operand 823 states and 956 transitions. Second operand has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 70 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:03:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:47,098 INFO L93 Difference]: Finished difference Result 1506 states and 1746 transitions. [2024-11-14 04:03:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-14 04:03:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 70 states have internal predecessors, (176), 0 states have call successors, (0), 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 04:03:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:47,099 INFO L225 Difference]: With dead ends: 1506 [2024-11-14 04:03:47,099 INFO L226 Difference]: Without dead ends: 841 [2024-11-14 04:03:47,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3591 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=491, Invalid=14515, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 04:03:47,100 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 252 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 5531 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 5549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:47,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1776 Invalid, 5549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5531 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-14 04:03:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-11-14 04:03:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 835. [2024-11-14 04:03:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.160671462829736) internal successors, (968), 834 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 04:03:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 968 transitions. [2024-11-14 04:03:47,109 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 968 transitions. Word has length 123 [2024-11-14 04:03:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:47,109 INFO L471 AbstractCegarLoop]: Abstraction has 835 states and 968 transitions. [2024-11-14 04:03:47,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 70 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:03:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 968 transitions. [2024-11-14 04:03:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 04:03:47,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:47,110 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:47,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 04:03:47,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:47,311 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:03:47,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash -440482284, now seen corresponding path program 35 times [2024-11-14 04:03:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:47,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464461062] [2024-11-14 04:03:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 289 proven. 775 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:50,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:50,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464461062] [2024-11-14 04:03:50,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464461062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:50,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053847431] [2024-11-14 04:03:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:03:50,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:50,544 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:50,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 04:03:51,587 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 04:03:51,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:03:51,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-14 04:03:51,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 324 proven. 740 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:54,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:56,572 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 04:03:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 324 proven. 740 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:03:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053847431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978067672] [2024-11-14 04:03:57,649 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:03:57,649 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:57,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:57,649 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:57,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:58,043 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:59,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181455#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:03:59,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:59,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:59,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 107 [2024-11-14 04:03:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801915293] [2024-11-14 04:03:59,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:59,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-14 04:03:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-14 04:03:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1782, Invalid=12260, Unknown=0, NotChecked=0, Total=14042 [2024-11-14 04:03:59,914 INFO L87 Difference]: Start difference. First operand 835 states and 968 transitions. Second operand has 108 states, 107 states have (on average 3.0934579439252334) internal successors, (331), 108 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 04:04:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:03,064 INFO L93 Difference]: Finished difference Result 1004 states and 1149 transitions. [2024-11-14 04:04:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 04:04:03,064 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 3.0934579439252334) internal successors, (331), 108 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 125 [2024-11-14 04:04:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:03,065 INFO L225 Difference]: With dead ends: 1004 [2024-11-14 04:04:03,065 INFO L226 Difference]: Without dead ends: 1004 [2024-11-14 04:04:03,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 278 SyntacticMatches, 20 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9010 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2427, Invalid=17313, Unknown=0, NotChecked=0, Total=19740 [2024-11-14 04:04:03,067 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 374 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:03,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 893 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 04:04:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2024-11-14 04:04:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 863. [2024-11-14 04:04:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.1624129930394431) internal successors, (1002), 862 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states 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 04:04:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1002 transitions. [2024-11-14 04:04:03,077 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1002 transitions. Word has length 125 [2024-11-14 04:04:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:03,077 INFO L471 AbstractCegarLoop]: Abstraction has 863 states and 1002 transitions. [2024-11-14 04:04:03,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 3.0934579439252334) internal successors, (331), 108 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 04:04:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1002 transitions. [2024-11-14 04:04:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 04:04:03,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:03,078 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:03,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-14 04:04:03,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:03,279 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:04:03,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1063821991, now seen corresponding path program 36 times [2024-11-14 04:04:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:03,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943097996] [2024-11-14 04:04:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:03,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:06,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:06,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943097996] [2024-11-14 04:04:06,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943097996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:06,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109809943] [2024-11-14 04:04:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:04:06,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:06,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:06,103 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:06,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 04:04:07,098 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:04:07,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:04:07,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-11-14 04:04:07,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:08,315 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 04:04:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:08,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:08,769 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 15 treesize of output 13 [2024-11-14 04:04:08,771 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 16 treesize of output 12 [2024-11-14 04:04:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109809943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446151366] [2024-11-14 04:04:09,000 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:04:09,001 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:09,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:09,001 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:09,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:09,523 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:11,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184218#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:04:11,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:11,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 73 [2024-11-14 04:04:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496598883] [2024-11-14 04:04:11,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:11,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 04:04:11,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 04:04:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=7224, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 04:04:11,720 INFO L87 Difference]: Start difference. First operand 863 states and 1002 transitions. Second operand has 73 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 04:04:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:17,608 INFO L93 Difference]: Finished difference Result 1580 states and 1832 transitions. [2024-11-14 04:04:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 04:04:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 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 129 [2024-11-14 04:04:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:17,609 INFO L225 Difference]: With dead ends: 1580 [2024-11-14 04:04:17,609 INFO L226 Difference]: Without dead ends: 881 [2024-11-14 04:04:17,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=511, Invalid=15745, Unknown=0, NotChecked=0, Total=16256 [2024-11-14 04:04:17,610 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 6090 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:17,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1843 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6090 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 04:04:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2024-11-14 04:04:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 875. [2024-11-14 04:04:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.160183066361556) internal successors, (1014), 874 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 04:04:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1014 transitions. [2024-11-14 04:04:17,616 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1014 transitions. Word has length 129 [2024-11-14 04:04:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:17,617 INFO L471 AbstractCegarLoop]: Abstraction has 875 states and 1014 transitions. [2024-11-14 04:04:17,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 04:04:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1014 transitions. [2024-11-14 04:04:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 04:04:17,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:17,618 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:17,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 04:04:17,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-14 04:04:17,818 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:04:17,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 911572527, now seen corresponding path program 37 times [2024-11-14 04:04:17,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:17,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594401302] [2024-11-14 04:04:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 324 proven. 856 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:21,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594401302] [2024-11-14 04:04:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594401302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286743494] [2024-11-14 04:04:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:04:21,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:21,256 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:21,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 04:04:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:21,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-14 04:04:21,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 361 proven. 819 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:23,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:25,536 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 04:04:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 361 proven. 819 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286743494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85812026] [2024-11-14 04:04:26,694 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:04:26,694 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:26,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:26,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:26,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:27,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:28,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '187642#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:04:28,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:28,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:28,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 92 [2024-11-14 04:04:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264742480] [2024-11-14 04:04:28,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:28,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-14 04:04:28,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-14 04:04:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=9638, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 04:04:28,992 INFO L87 Difference]: Start difference. First operand 875 states and 1014 transitions. Second operand has 93 states, 92 states have (on average 2.9347826086956523) internal successors, (270), 93 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 04:04:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:33,261 INFO L93 Difference]: Finished difference Result 1050 states and 1201 transitions. [2024-11-14 04:04:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:04:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 2.9347826086956523) internal successors, (270), 93 states have internal predecessors, (270), 0 states have call successors, (0), 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 131 [2024-11-14 04:04:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:33,263 INFO L225 Difference]: With dead ends: 1050 [2024-11-14 04:04:33,263 INFO L226 Difference]: Without dead ends: 1050 [2024-11-14 04:04:33,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 312 SyntacticMatches, 21 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7180 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1505, Invalid=14497, Unknown=0, NotChecked=0, Total=16002 [2024-11-14 04:04:33,265 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 301 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 4166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:33,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1307 Invalid, 4166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 04:04:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2024-11-14 04:04:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 903. [2024-11-14 04:04:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.1618625277161863) internal successors, (1048), 902 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 04:04:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1048 transitions. [2024-11-14 04:04:33,282 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1048 transitions. Word has length 131 [2024-11-14 04:04:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:33,282 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 1048 transitions. [2024-11-14 04:04:33,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 2.9347826086956523) internal successors, (270), 93 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 04:04:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1048 transitions. [2024-11-14 04:04:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 04:04:33,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:33,284 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:33,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-14 04:04:33,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:33,485 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:04:33,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -124874764, now seen corresponding path program 38 times [2024-11-14 04:04:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354880844] [2024-11-14 04:04:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 61 proven. 1200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:36,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354880844] [2024-11-14 04:04:36,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354880844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842144051] [2024-11-14 04:04:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:04:36,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:36,573 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:36,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 04:04:39,000 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-14 04:04:39,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:04:39,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-14 04:04:39,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:40,455 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 04:04:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 61 proven. 1200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:40,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:40,919 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 15 treesize of output 13 [2024-11-14 04:04:40,921 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 16 treesize of output 12 [2024-11-14 04:04:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 61 proven. 1200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842144051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244220654] [2024-11-14 04:04:41,158 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:04:41,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:41,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:41,158 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:41,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:41,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:43,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '190532#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:04:43,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:43,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 76 [2024-11-14 04:04:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895025851] [2024-11-14 04:04:43,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:43,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 04:04:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 04:04:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=7368, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 04:04:43,572 INFO L87 Difference]: Start difference. First operand 903 states and 1048 transitions. Second operand has 76 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:50,338 INFO L93 Difference]: Finished difference Result 1654 states and 1918 transitions. [2024-11-14 04:04:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-14 04:04:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-14 04:04:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:50,339 INFO L225 Difference]: With dead ends: 1654 [2024-11-14 04:04:50,339 INFO L226 Difference]: Without dead ends: 921 [2024-11-14 04:04:50,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=573, Invalid=16457, Unknown=0, NotChecked=0, Total=17030 [2024-11-14 04:04:50,340 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 279 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 7059 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 7079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:50,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2262 Invalid, 7079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7059 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 04:04:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2024-11-14 04:04:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 915. [2024-11-14 04:04:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.1597374179431073) internal successors, (1060), 914 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 04:04:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1060 transitions. [2024-11-14 04:04:50,348 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1060 transitions. Word has length 135 [2024-11-14 04:04:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:50,348 INFO L471 AbstractCegarLoop]: Abstraction has 915 states and 1060 transitions. [2024-11-14 04:04:50,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1060 transitions. [2024-11-14 04:04:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 04:04:50,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:50,350 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:50,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-14 04:04:50,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-14 04:04:50,551 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:04:50,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1482016694, now seen corresponding path program 39 times [2024-11-14 04:04:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865079291] [2024-11-14 04:04:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 361 proven. 941 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:53,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865079291] [2024-11-14 04:04:53,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865079291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129996057] [2024-11-14 04:04:53,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:04:53,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:53,734 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:53,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 04:04:54,671 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:04:54,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:04:54,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-11-14 04:04:54,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 400 proven. 902 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:04:56,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:58,668 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 04:05:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 400 proven. 902 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:00,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129996057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005721931] [2024-11-14 04:05:00,753 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:05:00,753 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:00,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:00,753 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:00,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:01,160 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:03,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '194134#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:05:03,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:03,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:05:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 117 [2024-11-14 04:05:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807704008] [2024-11-14 04:05:03,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:03,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-14 04:05:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-14 04:05:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2061, Invalid=14969, Unknown=0, NotChecked=0, Total=17030 [2024-11-14 04:05:03,592 INFO L87 Difference]: Start difference. First operand 915 states and 1060 transitions. Second operand has 119 states, 118 states have (on average 2.7966101694915255) internal successors, (330), 118 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 04:05:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:08,505 INFO L93 Difference]: Finished difference Result 1096 states and 1253 transitions. [2024-11-14 04:05:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 04:05:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 2.7966101694915255) internal successors, (330), 118 states have internal predecessors, (330), 0 states have call successors, (0), 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 04:05:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:08,506 INFO L225 Difference]: With dead ends: 1096 [2024-11-14 04:05:08,507 INFO L226 Difference]: Without dead ends: 1096 [2024-11-14 04:05:08,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8720 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2546, Invalid=21324, Unknown=0, NotChecked=0, Total=23870 [2024-11-14 04:05:08,508 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 422 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 4598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 4599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:08,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1530 Invalid, 4599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4598 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 04:05:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2024-11-14 04:05:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 943. [2024-11-14 04:05:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1613588110403397) internal successors, (1094), 942 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 04:05:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1094 transitions. [2024-11-14 04:05:08,524 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1094 transitions. Word has length 137 [2024-11-14 04:05:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:08,525 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1094 transitions. [2024-11-14 04:05:08,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 2.7966101694915255) internal successors, (330), 118 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 04:05:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1094 transitions. [2024-11-14 04:05:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-14 04:05:08,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:08,526 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:08,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-14 04:05:08,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:08,727 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:05:08,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -562903921, now seen corresponding path program 40 times [2024-11-14 04:05:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039260799] [2024-11-14 04:05:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:12,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:12,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039260799] [2024-11-14 04:05:12,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039260799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:12,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633200572] [2024-11-14 04:05:12,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:05:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:12,181 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-14 04:05:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:12,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-11-14 04:05:12,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:14,334 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 04:05:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:14,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:05:14,849 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 15 treesize of output 13 [2024-11-14 04:05:14,851 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 16 treesize of output 12 [2024-11-14 04:05:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633200572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401778340] [2024-11-14 04:05:15,094 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:05:15,094 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:15,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:15,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:15,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:15,558 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:17,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '197152#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:05:17,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:17,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:05:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 79 [2024-11-14 04:05:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134146768] [2024-11-14 04:05:17,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:17,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-14 04:05:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-14 04:05:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=7892, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 04:05:17,673 INFO L87 Difference]: Start difference. First operand 943 states and 1094 transitions. Second operand has 79 states, 79 states have (on average 2.5316455696202533) internal successors, (200), 79 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 04:05:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:25,394 INFO L93 Difference]: Finished difference Result 1728 states and 2004 transitions. [2024-11-14 04:05:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-14 04:05:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.5316455696202533) internal successors, (200), 79 states have internal predecessors, (200), 0 states have call successors, (0), 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 04:05:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:25,396 INFO L225 Difference]: With dead ends: 1728 [2024-11-14 04:05:25,396 INFO L226 Difference]: Without dead ends: 961 [2024-11-14 04:05:25,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=596, Invalid=17764, Unknown=0, NotChecked=0, Total=18360 [2024-11-14 04:05:25,397 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 161 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 7759 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 7780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:25,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2506 Invalid, 7780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7759 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-14 04:05:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-11-14 04:05:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 955. [2024-11-14 04:05:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.1593291404612158) internal successors, (1106), 954 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 04:05:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1106 transitions. [2024-11-14 04:05:25,408 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1106 transitions. Word has length 141 [2024-11-14 04:05:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:25,408 INFO L471 AbstractCegarLoop]: Abstraction has 955 states and 1106 transitions. [2024-11-14 04:05:25,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.5316455696202533) internal successors, (200), 79 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 04:05:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1106 transitions. [2024-11-14 04:05:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-14 04:05:25,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:25,410 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:25,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-14 04:05:25,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:25,611 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:05:25,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1770542181, now seen corresponding path program 41 times [2024-11-14 04:05:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:25,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390937525] [2024-11-14 04:05:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 400 proven. 1030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:29,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390937525] [2024-11-14 04:05:29,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390937525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223844481] [2024-11-14 04:05:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:05:29,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:29,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:29,126 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:29,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-14 04:05:32,991 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 04:05:32,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:05:33,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-14 04:05:33,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:33,018 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 04:05:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 441 proven. 989 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:36,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:05:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 441 proven. 989 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:41,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223844481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555445403] [2024-11-14 04:05:41,794 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:05:41,794 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:41,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:41,794 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:41,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:42,181 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:44,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200935#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:05:44,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:44,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:05:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 145 [2024-11-14 04:05:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363981908] [2024-11-14 04:05:44,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:44,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-11-14 04:05:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-11-14 04:05:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3129, Invalid=22311, Unknown=0, NotChecked=0, Total=25440 [2024-11-14 04:05:44,820 INFO L87 Difference]: Start difference. First operand 955 states and 1106 transitions. Second operand has 146 states, 145 states have (on average 2.9379310344827587) internal successors, (426), 146 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 04:05:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:48,619 INFO L93 Difference]: Finished difference Result 1142 states and 1305 transitions. [2024-11-14 04:05:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 04:05:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 2.9379310344827587) internal successors, (426), 146 states have internal predecessors, (426), 0 states have call successors, (0), 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 143 [2024-11-14 04:05:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:48,620 INFO L225 Difference]: With dead ends: 1142 [2024-11-14 04:05:48,620 INFO L226 Difference]: Without dead ends: 1142 [2024-11-14 04:05:48,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13499 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3962, Invalid=30078, Unknown=0, NotChecked=0, Total=34040 [2024-11-14 04:05:48,622 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 273 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:48,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1228 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2934 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 04:05:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2024-11-14 04:05:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 983. [2024-11-14 04:05:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 1.1608961303462322) internal successors, (1140), 982 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 04:05:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1140 transitions. [2024-11-14 04:05:48,636 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1140 transitions. Word has length 143 [2024-11-14 04:05:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:48,636 INFO L471 AbstractCegarLoop]: Abstraction has 983 states and 1140 transitions. [2024-11-14 04:05:48,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 2.9379310344827587) internal successors, (426), 146 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 04:05:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1140 transitions. [2024-11-14 04:05:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-14 04:05:48,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:48,637 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:48,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-14 04:05:48,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:48,838 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:05:48,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash 224353066, now seen corresponding path program 42 times [2024-11-14 04:05:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493315801] [2024-11-14 04:05:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 67 proven. 1452 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:52,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493315801] [2024-11-14 04:05:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493315801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285255198] [2024-11-14 04:05:52,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:05:52,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:52,383 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:52,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-14 04:05:53,710 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:05:53,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:05:53,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-11-14 04:05:53,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:55,201 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 04:05:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 67 proven. 1452 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:55,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:05:55,733 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 15 treesize of output 13 [2024-11-14 04:05:55,735 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 16 treesize of output 12 [2024-11-14 04:05:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 67 proven. 1452 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:05:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285255198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111967366] [2024-11-14 04:05:55,985 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:05:55,985 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:55,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:55,985 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:55,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:56,337 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:58,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '204082#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:05:58,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:58,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:05:58,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 82 [2024-11-14 04:05:58,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119192367] [2024-11-14 04:05:58,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:58,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 04:05:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 04:05:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 04:05:58,662 INFO L87 Difference]: Start difference. First operand 983 states and 1140 transitions. Second operand has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 04:06:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:07,043 INFO L93 Difference]: Finished difference Result 1802 states and 2090 transitions. [2024-11-14 04:06:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-14 04:06:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 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 147 [2024-11-14 04:06:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:07,044 INFO L225 Difference]: With dead ends: 1802 [2024-11-14 04:06:07,044 INFO L226 Difference]: Without dead ends: 1001 [2024-11-14 04:06:07,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4801 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=571, Invalid=19735, Unknown=0, NotChecked=0, Total=20306 [2024-11-14 04:06:07,045 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 167 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 9185 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2867 SdHoareTripleChecker+Invalid, 9207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 9185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:07,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2867 Invalid, 9207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 9185 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 04:06:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2024-11-14 04:06:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 995. [2024-11-14 04:06:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 1.158953722334004) internal successors, (1152), 994 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 04:06:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1152 transitions. [2024-11-14 04:06:07,054 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1152 transitions. Word has length 147 [2024-11-14 04:06:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:07,054 INFO L471 AbstractCegarLoop]: Abstraction has 995 states and 1152 transitions. [2024-11-14 04:06:07,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 04:06:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1152 transitions. [2024-11-14 04:06:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 04:06:07,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:07,055 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:07,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-11-14 04:06:07,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:07,255 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:06:07,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash 138621568, now seen corresponding path program 43 times [2024-11-14 04:06:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:07,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507564501] [2024-11-14 04:06:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 441 proven. 1123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:11,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507564501] [2024-11-14 04:06:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507564501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:06:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649846811] [2024-11-14 04:06:11,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:06:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:11,110 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:11,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-14 04:06:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:11,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-11-14 04:06:11,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 484 proven. 1080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:13,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:16,152 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 5 treesize of output 3 [2024-11-14 04:06:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 484 proven. 1080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649846811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:17,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956014766] [2024-11-14 04:06:17,606 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:06:17,606 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:17,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:17,606 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:17,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:06:17,991 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:06:20,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207980#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:06:20,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:06:20,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:06:20,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 104 [2024-11-14 04:06:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137281694] [2024-11-14 04:06:20,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:06:20,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-14 04:06:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:06:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-14 04:06:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=12654, Unknown=0, NotChecked=0, Total=14042 [2024-11-14 04:06:20,375 INFO L87 Difference]: Start difference. First operand 995 states and 1152 transitions. Second operand has 105 states, 104 states have (on average 2.9423076923076925) internal successors, (306), 105 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 04:06:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:25,706 INFO L93 Difference]: Finished difference Result 1188 states and 1357 transitions. [2024-11-14 04:06:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 04:06:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 2.9423076923076925) internal successors, (306), 105 states have internal predecessors, (306), 0 states have call successors, (0), 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 149 [2024-11-14 04:06:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:25,707 INFO L225 Difference]: With dead ends: 1188 [2024-11-14 04:06:25,707 INFO L226 Difference]: Without dead ends: 1188 [2024-11-14 04:06:25,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 354 SyntacticMatches, 24 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9582 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1915, Invalid=18965, Unknown=0, NotChecked=0, Total=20880 [2024-11-14 04:06:25,708 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 465 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 5856 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 5857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:25,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1839 Invalid, 5857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5856 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 04:06:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-11-14 04:06:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1023. [2024-11-14 04:06:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.1604696673189825) internal successors, (1186), 1022 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 04:06:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1186 transitions. [2024-11-14 04:06:25,719 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1186 transitions. Word has length 149 [2024-11-14 04:06:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:25,720 INFO L471 AbstractCegarLoop]: Abstraction has 1023 states and 1186 transitions. [2024-11-14 04:06:25,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 2.9423076923076925) internal successors, (306), 105 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 04:06:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1186 transitions. [2024-11-14 04:06:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-14 04:06:25,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:25,721 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:25,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-14 04:06:25,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:25,921 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:06:25,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash -117984315, now seen corresponding path program 44 times [2024-11-14 04:06:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:25,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048190457] [2024-11-14 04:06:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:29,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048190457] [2024-11-14 04:06:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048190457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:06:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647955191] [2024-11-14 04:06:29,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:06:29,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:29,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:29,985 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:29,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-14 04:06:33,065 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-14 04:06:33,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:06:33,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 247 conjuncts are in the unsatisfiable core [2024-11-14 04:06:33,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:34,742 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 04:06:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:35,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:35,318 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 15 treesize of output 13 [2024-11-14 04:06:35,320 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 16 treesize of output 12 [2024-11-14 04:06:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647955191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:35,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423972483] [2024-11-14 04:06:35,572 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:06:35,572 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:35,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:35,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:35,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:06:35,956 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:06:38,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '211254#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:06:38,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:06:38,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:06:38,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 85 [2024-11-14 04:06:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249564677] [2024-11-14 04:06:38,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:06:38,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-14 04:06:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:06:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-14 04:06:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=8994, Unknown=0, NotChecked=0, Total=9312 [2024-11-14 04:06:38,141 INFO L87 Difference]: Start difference. First operand 1023 states and 1186 transitions. Second operand has 85 states, 85 states have (on average 2.541176470588235) internal successors, (216), 85 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 04:06:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:47,121 INFO L93 Difference]: Finished difference Result 1876 states and 2176 transitions. [2024-11-14 04:06:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 04:06:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.541176470588235) internal successors, (216), 85 states have internal predecessors, (216), 0 states have call successors, (0), 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 153 [2024-11-14 04:06:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:47,123 INFO L225 Difference]: With dead ends: 1876 [2024-11-14 04:06:47,123 INFO L226 Difference]: Without dead ends: 1041 [2024-11-14 04:06:47,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=642, Invalid=20528, Unknown=0, NotChecked=0, Total=21170 [2024-11-14 04:06:47,124 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 316 mSDsluCounter, 3065 mSDsCounter, 0 mSdLazyCounter, 9563 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 3115 SdHoareTripleChecker+Invalid, 9586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 9563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:47,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 3115 Invalid, 9586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 9563 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 04:06:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2024-11-14 04:06:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1035. [2024-11-14 04:06:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 1.1586073500967118) internal successors, (1198), 1034 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 04:06:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1198 transitions. [2024-11-14 04:06:47,132 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1198 transitions. Word has length 153 [2024-11-14 04:06:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:47,132 INFO L471 AbstractCegarLoop]: Abstraction has 1035 states and 1198 transitions. [2024-11-14 04:06:47,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.541176470588235) internal successors, (216), 85 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 04:06:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1198 transitions. [2024-11-14 04:06:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-14 04:06:47,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:47,133 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:47,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-14 04:06:47,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:47,334 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:06:47,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 515256987, now seen corresponding path program 45 times [2024-11-14 04:06:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176292316] [2024-11-14 04:06:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 484 proven. 1220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:51,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176292316] [2024-11-14 04:06:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176292316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:06:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479285669] [2024-11-14 04:06:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:06:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:51,332 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:51,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-14 04:06:52,360 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:06:52,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:06:52,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 230 conjuncts are in the unsatisfiable core [2024-11-14 04:06:52,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 529 proven. 1175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:54,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:57,229 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 04:06:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 529 proven. 1175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:06:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479285669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133816023] [2024-11-14 04:06:59,958 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:06:59,958 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:59,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:59,958 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:59,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:07:00,315 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:03,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215333#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:07:03,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:07:03,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:03,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 132 [2024-11-14 04:07:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352211558] [2024-11-14 04:07:03,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:07:03,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-14 04:07:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-14 04:07:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=19201, Unknown=0, NotChecked=0, Total=21756 [2024-11-14 04:07:03,124 INFO L87 Difference]: Start difference. First operand 1035 states and 1198 transitions. Second operand has 134 states, 133 states have (on average 2.7969924812030076) internal successors, (372), 133 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 04:07:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:07:09,564 INFO L93 Difference]: Finished difference Result 1234 states and 1409 transitions. [2024-11-14 04:07:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 04:07:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 2.7969924812030076) internal successors, (372), 133 states have internal predecessors, (372), 0 states have call successors, (0), 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 04:07:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:07:09,566 INFO L225 Difference]: With dead ends: 1234 [2024-11-14 04:07:09,566 INFO L226 Difference]: Without dead ends: 1234 [2024-11-14 04:07:09,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3141, Invalid=27309, Unknown=0, NotChecked=0, Total=30450 [2024-11-14 04:07:09,568 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 348 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 6284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 6285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:07:09,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1997 Invalid, 6285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6284 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-14 04:07:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2024-11-14 04:07:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1063. [2024-11-14 04:07:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 1.1600753295668549) internal successors, (1232), 1062 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 04:07:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1232 transitions. [2024-11-14 04:07:09,593 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1232 transitions. Word has length 155 [2024-11-14 04:07:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:07:09,594 INFO L471 AbstractCegarLoop]: Abstraction has 1063 states and 1232 transitions. [2024-11-14 04:07:09,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 2.7969924812030076) internal successors, (372), 133 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 04:07:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1232 transitions. [2024-11-14 04:07:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 04:07:09,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:07:09,596 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:07:09,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-11-14 04:07:09,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:07:09,797 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:07:09,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:07:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1620627872, now seen corresponding path program 46 times [2024-11-14 04:07:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:07:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110260705] [2024-11-14 04:07:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:07:09,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:07:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:07:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 73 proven. 1728 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:14,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:07:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110260705] [2024-11-14 04:07:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110260705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:07:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960873328] [2024-11-14 04:07:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:07:14,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:07:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:07:14,216 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:07:14,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-14 04:07:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:07:14,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-14 04:07:14,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:07:16,636 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 04:07:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 73 proven. 1728 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:16,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:07:17,207 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 15 treesize of output 13 [2024-11-14 04:07:17,209 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 16 treesize of output 12 [2024-11-14 04:07:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 73 proven. 1728 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960873328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:07:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092952317] [2024-11-14 04:07:17,501 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:07:17,501 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:07:17,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:07:17,501 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:07:17,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:07:17,879 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:20,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218734#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:07:20,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:07:20,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 88 [2024-11-14 04:07:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182251341] [2024-11-14 04:07:20,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:07:20,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 04:07:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 04:07:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=10004, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:07:20,461 INFO L87 Difference]: Start difference. First operand 1063 states and 1232 transitions. Second operand has 88 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 04:07:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:07:29,225 INFO L93 Difference]: Finished difference Result 1950 states and 2262 transitions. [2024-11-14 04:07:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-14 04:07:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 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 159 [2024-11-14 04:07:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:07:29,226 INFO L225 Difference]: With dead ends: 1950 [2024-11-14 04:07:29,226 INFO L226 Difference]: Without dead ends: 1081 [2024-11-14 04:07:29,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5472 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=611, Invalid=22645, Unknown=0, NotChecked=0, Total=23256 [2024-11-14 04:07:29,227 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 184 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 9029 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 9053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 9029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:07:29,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2699 Invalid, 9053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 9029 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 04:07:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2024-11-14 04:07:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1075. [2024-11-14 04:07:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.1582867783985102) internal successors, (1244), 1074 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states 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 04:07:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1244 transitions. [2024-11-14 04:07:29,237 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1244 transitions. Word has length 159 [2024-11-14 04:07:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:07:29,237 INFO L471 AbstractCegarLoop]: Abstraction has 1075 states and 1244 transitions. [2024-11-14 04:07:29,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 04:07:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1244 transitions. [2024-11-14 04:07:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 04:07:29,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:07:29,239 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:07:29,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-14 04:07:29,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-11-14 04:07:29,440 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:07:29,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:07:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2008763210, now seen corresponding path program 47 times [2024-11-14 04:07:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:07:29,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410703758] [2024-11-14 04:07:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:07:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:07:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:07:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 529 proven. 1321 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:33,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:07:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410703758] [2024-11-14 04:07:33,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410703758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:07:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438204853] [2024-11-14 04:07:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:07:33,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:07:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:07:33,837 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:07:33,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-14 04:07:38,781 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 04:07:38,781 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:07:38,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-11-14 04:07:38,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:07:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 576 proven. 1274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:42,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:07:46,342 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 04:07:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 576 proven. 1274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438204853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:07:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721118386] [2024-11-14 04:07:47,909 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:07:47,909 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:07:47,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:07:47,910 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:07:47,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:07:48,286 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:50,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222973#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:07:50,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:07:50,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:50,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 137 [2024-11-14 04:07:50,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449528323] [2024-11-14 04:07:50,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:07:50,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-14 04:07:50,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-14 04:07:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=19128, Unknown=0, NotChecked=0, Total=22052 [2024-11-14 04:07:50,542 INFO L87 Difference]: Start difference. First operand 1075 states and 1244 transitions. Second operand has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 138 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 04:07:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:07:54,332 INFO L93 Difference]: Finished difference Result 1280 states and 1461 transitions. [2024-11-14 04:07:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 04:07:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 138 states have internal predecessors, (427), 0 states have call successors, (0), 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 161 [2024-11-14 04:07:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:07:54,334 INFO L225 Difference]: With dead ends: 1280 [2024-11-14 04:07:54,334 INFO L226 Difference]: Without dead ends: 1280 [2024-11-14 04:07:54,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 362 SyntacticMatches, 26 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14460 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=3917, Invalid=27235, Unknown=0, NotChecked=0, Total=31152 [2024-11-14 04:07:54,336 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 703 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:07:54,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1391 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 04:07:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2024-11-14 04:07:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1103. [2024-11-14 04:07:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 1.159709618874773) internal successors, (1278), 1102 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 04:07:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1278 transitions. [2024-11-14 04:07:54,349 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1278 transitions. Word has length 161 [2024-11-14 04:07:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:07:54,349 INFO L471 AbstractCegarLoop]: Abstraction has 1103 states and 1278 transitions. [2024-11-14 04:07:54,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 138 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 04:07:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1278 transitions. [2024-11-14 04:07:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-14 04:07:54,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:07:54,350 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:07:54,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-14 04:07:54,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-14 04:07:54,551 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:07:54,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:07:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1151259909, now seen corresponding path program 48 times [2024-11-14 04:07:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:07:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525074329] [2024-11-14 04:07:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:07:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:07:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:07:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:07:59,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:07:59,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525074329] [2024-11-14 04:07:59,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525074329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:07:59,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883110899] [2024-11-14 04:07:59,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:07:59,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:07:59,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:07:59,026 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:07:59,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-14 04:08:01,403 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:08:01,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:08:01,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 271 conjuncts are in the unsatisfiable core [2024-11-14 04:08:01,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:03,253 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 04:08:03,628 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 7 treesize of output 3 [2024-11-14 04:08:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:03,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:03,852 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 15 treesize of output 13 [2024-11-14 04:08:03,854 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 16 treesize of output 12 [2024-11-14 04:08:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883110899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450330115] [2024-11-14 04:08:04,131 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:08:04,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:04,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:04,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:04,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:04,574 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:06,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226498#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:08:06,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:06,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:08:06,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 91 [2024-11-14 04:08:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657164649] [2024-11-14 04:08:06,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:06,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-14 04:08:06,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:06,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-14 04:08:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=10168, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:08:06,895 INFO L87 Difference]: Start difference. First operand 1103 states and 1278 transitions. Second operand has 91 states, 91 states have (on average 2.5494505494505493) internal successors, (232), 91 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:08:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:17,103 INFO L93 Difference]: Finished difference Result 2024 states and 2348 transitions. [2024-11-14 04:08:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-14 04:08:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.5494505494505493) internal successors, (232), 91 states have internal predecessors, (232), 0 states have call successors, (0), 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 165 [2024-11-14 04:08:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:17,104 INFO L225 Difference]: With dead ends: 2024 [2024-11-14 04:08:17,104 INFO L226 Difference]: Without dead ends: 1121 [2024-11-14 04:08:17,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5520 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=688, Invalid=23492, Unknown=0, NotChecked=0, Total=24180 [2024-11-14 04:08:17,105 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 343 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 10715 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 10740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 10715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:17,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 3471 Invalid, 10740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 10715 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-14 04:08:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2024-11-14 04:08:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1115. [2024-11-14 04:08:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 1.1579892280071813) internal successors, (1290), 1114 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 04:08:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1290 transitions. [2024-11-14 04:08:17,113 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1290 transitions. Word has length 165 [2024-11-14 04:08:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:17,113 INFO L471 AbstractCegarLoop]: Abstraction has 1115 states and 1290 transitions. [2024-11-14 04:08:17,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.5494505494505493) internal successors, (232), 91 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:08:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1290 transitions. [2024-11-14 04:08:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 04:08:17,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:17,114 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:17,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-14 04:08:17,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-14 04:08:17,315 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:08:17,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 316283089, now seen corresponding path program 49 times [2024-11-14 04:08:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:17,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764170259] [2024-11-14 04:08:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 576 proven. 1426 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:22,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764170259] [2024-11-14 04:08:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764170259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305805671] [2024-11-14 04:08:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:08:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:22,711 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:22,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-14 04:08:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:23,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 246 conjuncts are in the unsatisfiable core [2024-11-14 04:08:23,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 625 proven. 1377 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:25,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:28,265 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 04:08:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 625 proven. 1377 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305805671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237867453] [2024-11-14 04:08:30,024 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:08:30,024 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:30,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:30,025 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:30,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:30,407 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:32,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '230868#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:08:32,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:32,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:08:32,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 116 [2024-11-14 04:08:32,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879346840] [2024-11-14 04:08:32,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:32,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-14 04:08:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-14 04:08:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1712, Invalid=15318, Unknown=0, NotChecked=0, Total=17030 [2024-11-14 04:08:32,653 INFO L87 Difference]: Start difference. First operand 1115 states and 1290 transitions. Second operand has 117 states, 116 states have (on average 2.9482758620689653) internal successors, (342), 117 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 04:08:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:38,300 INFO L93 Difference]: Finished difference Result 1326 states and 1513 transitions. [2024-11-14 04:08:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 04:08:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 116 states have (on average 2.9482758620689653) internal successors, (342), 117 states have internal predecessors, (342), 0 states have call successors, (0), 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 167 [2024-11-14 04:08:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:38,302 INFO L225 Difference]: With dead ends: 1326 [2024-11-14 04:08:38,302 INFO L226 Difference]: Without dead ends: 1326 [2024-11-14 04:08:38,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 399 SyntacticMatches, 27 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11775 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2344, Invalid=23096, Unknown=0, NotChecked=0, Total=25440 [2024-11-14 04:08:38,304 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 424 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 6517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 6518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:38,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2111 Invalid, 6518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6517 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 04:08:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2024-11-14 04:08:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1143. [2024-11-14 04:08:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.159369527145359) internal successors, (1324), 1142 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:08:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1324 transitions. [2024-11-14 04:08:38,323 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1324 transitions. Word has length 167 [2024-11-14 04:08:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:38,323 INFO L471 AbstractCegarLoop]: Abstraction has 1143 states and 1324 transitions. [2024-11-14 04:08:38,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 116 states have (on average 2.9482758620689653) internal successors, (342), 117 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 04:08:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1324 transitions. [2024-11-14 04:08:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 04:08:38,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:38,326 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:38,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-14 04:08:38,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:38,526 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:08:38,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1981876630, now seen corresponding path program 50 times [2024-11-14 04:08:38,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:38,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801090896] [2024-11-14 04:08:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 79 proven. 2028 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:42,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801090896] [2024-11-14 04:08:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801090896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:42,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064091555] [2024-11-14 04:08:42,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:08:42,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:42,966 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:42,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-14 04:08:46,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-14 04:08:46,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:08:46,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-11-14 04:08:46,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:47,988 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 04:08:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 79 proven. 2028 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:48,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:48,478 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 15 treesize of output 13 [2024-11-14 04:08:48,480 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 16 treesize of output 12 [2024-11-14 04:08:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 79 proven. 2028 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:08:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064091555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212207505] [2024-11-14 04:08:48,711 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:08:48,711 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:48,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:48,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:48,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:49,012 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:51,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234523#(and (= |ULTIMATE.start_cstrspn_~sc1~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= |ULTIMATE.start_cstrspn_~s1#1.offset| 0))' at error location [2024-11-14 04:08:51,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:51,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:08:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 94 [2024-11-14 04:08:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324580685] [2024-11-14 04:08:51,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:51,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 04:08:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 04:08:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=11242, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 04:08:51,377 INFO L87 Difference]: Start difference. First operand 1143 states and 1324 transitions. Second operand has 94 states, 94 states have (on average 2.5531914893617023) internal successors, (240), 94 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:09:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:00,560 INFO L93 Difference]: Finished difference Result 2098 states and 2434 transitions. [2024-11-14 04:09:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-14 04:09:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.5531914893617023) internal successors, (240), 94 states have internal predecessors, (240), 0 states have call successors, (0), 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 171 [2024-11-14 04:09:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:00,561 INFO L225 Difference]: With dead ends: 2098 [2024-11-14 04:09:00,561 INFO L226 Difference]: Without dead ends: 1161 [2024-11-14 04:09:00,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=651, Invalid=25755, Unknown=0, NotChecked=0, Total=26406 [2024-11-14 04:09:00,562 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 356 mSDsluCounter, 3839 mSDsCounter, 0 mSdLazyCounter, 12241 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 3895 SdHoareTripleChecker+Invalid, 12267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 12241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:00,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 3895 Invalid, 12267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 12241 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-14 04:09:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2024-11-14 04:09:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1155. [2024-11-14 04:09:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.1577123050259965) internal successors, (1336), 1154 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 04:09:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1336 transitions. [2024-11-14 04:09:00,572 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1336 transitions. Word has length 171 [2024-11-14 04:09:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:00,572 INFO L471 AbstractCegarLoop]: Abstraction has 1155 states and 1336 transitions. [2024-11-14 04:09:00,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.5531914893617023) internal successors, (240), 94 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:09:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1336 transitions. [2024-11-14 04:09:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-14 04:09:00,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:00,573 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:00,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:00,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:00,773 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:09:00,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1326858516, now seen corresponding path program 51 times [2024-11-14 04:09:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693728434] [2024-11-14 04:09:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 625 proven. 1535 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:05,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693728434] [2024-11-14 04:09:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693728434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722095479] [2024-11-14 04:09:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:09:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:05,019 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:05,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-14 04:09:06,711 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:09:06,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:09:06,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-14 04:09:06,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 676 proven. 1484 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:09,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:11,563 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 04:09:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 676 proven. 1484 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:14,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722095479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642026739] [2024-11-14 04:09:14,151 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:09:14,152 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:14,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:14,152 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:14,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:14,503 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:16,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239081#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:09:16,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:16,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:09:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 147 [2024-11-14 04:09:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77636959] [2024-11-14 04:09:16,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:16,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-14 04:09:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-14 04:09:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3192, Invalid=22568, Unknown=0, NotChecked=0, Total=25760 [2024-11-14 04:09:16,821 INFO L87 Difference]: Start difference. First operand 1155 states and 1336 transitions. Second operand has 149 states, 148 states have (on average 2.7972972972972974) internal successors, (414), 148 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 04:09:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:22,953 INFO L93 Difference]: Finished difference Result 1372 states and 1565 transitions. [2024-11-14 04:09:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 04:09:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 148 states have (on average 2.7972972972972974) internal successors, (414), 148 states have internal predecessors, (414), 0 states have call successors, (0), 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 173 [2024-11-14 04:09:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:22,954 INFO L225 Difference]: With dead ends: 1372 [2024-11-14 04:09:22,954 INFO L226 Difference]: Without dead ends: 1372 [2024-11-14 04:09:22,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13337 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3890, Invalid=32400, Unknown=0, NotChecked=0, Total=36290 [2024-11-14 04:09:22,956 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 754 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 7204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 7205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:22,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 2193 Invalid, 7205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7204 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 04:09:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2024-11-14 04:09:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1183. [2024-11-14 04:09:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.1590524534686972) internal successors, (1370), 1182 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states 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 04:09:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1370 transitions. [2024-11-14 04:09:22,968 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1370 transitions. Word has length 173 [2024-11-14 04:09:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:22,968 INFO L471 AbstractCegarLoop]: Abstraction has 1183 states and 1370 transitions. [2024-11-14 04:09:22,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 148 states have (on average 2.7972972972972974) internal successors, (414), 148 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 04:09:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1370 transitions. [2024-11-14 04:09:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-14 04:09:22,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:22,969 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:22,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:23,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:23,169 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:09:23,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1721095631, now seen corresponding path program 52 times [2024-11-14 04:09:23,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412652786] [2024-11-14 04:09:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:27,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412652786] [2024-11-14 04:09:27,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412652786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390213129] [2024-11-14 04:09:27,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:09:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:27,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:27,587 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:27,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-14 04:09:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:28,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 287 conjuncts are in the unsatisfiable core [2024-11-14 04:09:28,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:30,187 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 04:09:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:30,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:30,705 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 15 treesize of output 13 [2024-11-14 04:09:30,706 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 16 treesize of output 12 [2024-11-14 04:09:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:30,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390213129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255187128] [2024-11-14 04:09:30,943 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:09:30,943 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:30,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:30,943 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:30,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:31,325 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:33,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '242861#(and (<= 0 |ULTIMATE.start_cstrspn_~sc1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|))' at error location [2024-11-14 04:09:33,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:33,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:09:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 97 [2024-11-14 04:09:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547245711] [2024-11-14 04:09:33,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:33,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 04:09:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 04:09:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=11414, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 04:09:33,264 INFO L87 Difference]: Start difference. First operand 1183 states and 1370 transitions. Second operand has 97 states, 97 states have (on average 2.556701030927835) internal successors, (248), 97 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 04:09:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:42,243 INFO L93 Difference]: Finished difference Result 2172 states and 2520 transitions. [2024-11-14 04:09:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-14 04:09:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.556701030927835) internal successors, (248), 97 states have internal predecessors, (248), 0 states have call successors, (0), 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 177 [2024-11-14 04:09:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:42,244 INFO L225 Difference]: With dead ends: 2172 [2024-11-14 04:09:42,244 INFO L226 Difference]: Without dead ends: 1201 [2024-11-14 04:09:42,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6237 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=734, Invalid=26656, Unknown=0, NotChecked=0, Total=27390 [2024-11-14 04:09:42,245 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 370 mSDsluCounter, 3518 mSDsCounter, 0 mSdLazyCounter, 11664 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 11691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 11664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:42,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 3576 Invalid, 11691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 11664 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-14 04:09:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2024-11-14 04:09:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1195. [2024-11-14 04:09:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.1574539363484087) internal successors, (1382), 1194 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states 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 04:09:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1382 transitions. [2024-11-14 04:09:42,252 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1382 transitions. Word has length 177 [2024-11-14 04:09:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:42,252 INFO L471 AbstractCegarLoop]: Abstraction has 1195 states and 1382 transitions. [2024-11-14 04:09:42,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.556701030927835) internal successors, (248), 97 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 04:09:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1382 transitions. [2024-11-14 04:09:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-14 04:09:42,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:42,254 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:42,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-14 04:09:42,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:42,454 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 04:09:42,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 728696583, now seen corresponding path program 53 times [2024-11-14 04:09:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:42,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873387192] [2024-11-14 04:09:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 676 proven. 1648 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:46,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873387192] [2024-11-14 04:09:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873387192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294356519] [2024-11-14 04:09:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:09:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:46,971 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:46,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4bd999-3cc0-4808-bd57-190e7cefd395/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-14 04:09:51,355 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-14 04:09:51,355 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:09:51,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 211 conjuncts are in the unsatisfiable core [2024-11-14 04:09:51,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:51,379 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 04:09:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 729 proven. 1595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:55,290 INFO L311 TraceCheckSpWp]: Computing backward predicates...