./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.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_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/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_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/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_53b6d051-3949-4da6-80d7-11834cd3603c/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 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:16:36,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:16:36,892 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:16:36,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:16:36,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:16:36,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:16:36,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:16:36,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:16:36,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:16:36,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:16:36,961 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:16:36,961 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:16:36,962 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:16:36,962 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:16:36,963 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:16:36,963 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:16:36,963 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:16:36,963 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:16:36,963 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:16:36,963 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:16:36,964 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:16:36,964 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:16:36,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:16:36,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:16:36,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:16:36,966 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:16:36,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:16:36,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:16:36,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:16:36,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:16:36,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:16:36,968 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:16:36,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:16:36,969 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_53b6d051-3949-4da6-80d7-11834cd3603c/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 -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2024-11-14 03:16:37,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:16:37,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:16:37,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:16:37,396 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:16:37,397 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:16:37,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i Unable to find full path for "g++" [2024-11-14 03:16:39,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:16:39,810 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:16:39,811 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2024-11-14 03:16:39,836 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/data/b9441b2ae/4f750ab834e24807bcdf5fe8eee0505e/FLAGe47ae872b [2024-11-14 03:16:39,860 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/data/b9441b2ae/4f750ab834e24807bcdf5fe8eee0505e [2024-11-14 03:16:39,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:16:39,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:16:39,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:16:39,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:16:39,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:16:39,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:16:39" (1/1) ... [2024-11-14 03:16:39,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334efdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:39, skipping insertion in model container [2024-11-14 03:16:39,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:16:39" (1/1) ... [2024-11-14 03:16:39,934 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:16:40,363 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 03:16:40,364 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 03:16:40,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:16:40,387 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:16:40,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:16:40,495 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:16:40,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40 WrapperNode [2024-11-14 03:16:40,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:16:40,498 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:16:40,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:16:40,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:16:40,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,557 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2024-11-14 03:16:40,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:16:40,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:16:40,560 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:16:40,560 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:16:40,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,594 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,600 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:16:40,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:16:40,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:16:40,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:16:40,608 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (1/1) ... [2024-11-14 03:16:40,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:16:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:40,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:16:40,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:16:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:16:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:16:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:16:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:16:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:16:40,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:16:40,814 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:16:40,817 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:16:41,199 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-14 03:16:41,200 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:16:41,325 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:16:41,325 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:16:41,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:16:41 BoogieIcfgContainer [2024-11-14 03:16:41,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:16:41,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:16:41,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:16:41,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:16:41,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:16:39" (1/3) ... [2024-11-14 03:16:41,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b91305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:16:41, skipping insertion in model container [2024-11-14 03:16:41,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:16:40" (2/3) ... [2024-11-14 03:16:41,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b91305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:16:41, skipping insertion in model container [2024-11-14 03:16:41,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:16:41" (3/3) ... [2024-11-14 03:16:41,342 INFO L112 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2024-11-14 03:16:41,362 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:16:41,363 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG subseq-alloca-2.i that has 1 procedures, 35 locations, 1 initial locations, 3 loop locations, and 19 error locations. [2024-11-14 03:16:41,415 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:16:41,436 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;@2e1bd6ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:16:41,439 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-14 03:16:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 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 03:16:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:16:41,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:41,451 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:16:41,452 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 03:16:41,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:41,458 INFO L85 PathProgramCache]: Analyzing trace with hash 153537, now seen corresponding path program 1 times [2024-11-14 03:16:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:41,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112362230] [2024-11-14 03:16:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:41,900 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 03:16:41,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112362230] [2024-11-14 03:16:41,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112362230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:41,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:41,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:16:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100784889] [2024-11-14 03:16:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:41,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:41,941 INFO L87 Difference]: Start difference. First operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 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) 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 03:16:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:42,041 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-11-14 03:16:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:42,043 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 03:16:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:42,051 INFO L225 Difference]: With dead ends: 33 [2024-11-14 03:16:42,051 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 03:16:42,053 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 03:16:42,058 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 29 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 03:16:42,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 03:16:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 03:16:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-14 03:16:42,100 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2024-11-14 03:16:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:42,101 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-14 03:16:42,101 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 03:16:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-14 03:16:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:16:42,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:42,102 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:16:42,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:16:42,103 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 03:16:42,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 153538, now seen corresponding path program 1 times [2024-11-14 03:16:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:42,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728099082] [2024-11-14 03:16:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:42,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:42,580 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 03:16:42,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728099082] [2024-11-14 03:16:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728099082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:42,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523350491] [2024-11-14 03:16:42,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:42,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:42,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:42,586 INFO L87 Difference]: Start difference. First operand 32 states and 35 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 03:16:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:42,733 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-14 03:16:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:42,734 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 03:16:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:42,735 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:16:42,736 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 03:16:42,736 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 03:16:42,737 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:42,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 03:16:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 03:16:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 30 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 03:16:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-14 03:16:42,747 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 3 [2024-11-14 03:16:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:42,747 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-14 03:16:42,748 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 03:16:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-14 03:16:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:16:42,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:42,748 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:16:42,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:16:42,749 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 03:16:42,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash 4858144, now seen corresponding path program 1 times [2024-11-14 03:16:42,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:42,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114694803] [2024-11-14 03:16:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:42,856 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 03:16:42,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:42,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114694803] [2024-11-14 03:16:42,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114694803] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:42,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:42,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:16:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335502109] [2024-11-14 03:16:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:42,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:42,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:42,858 INFO L87 Difference]: Start difference. First operand 31 states and 34 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 03:16:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:42,921 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-11-14 03:16:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:42,922 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 03:16:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:42,923 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:16:42,923 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:16:42,924 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 03:16:42,924 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 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 03:16:42,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:16:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 03:16:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-14 03:16:42,931 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 4 [2024-11-14 03:16:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:42,933 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-14 03:16:42,933 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 03:16:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-14 03:16:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:16:42,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:42,934 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:16:42,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:16:42,934 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 03:16:42,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 4858145, now seen corresponding path program 1 times [2024-11-14 03:16:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:42,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079917848] [2024-11-14 03:16:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:43,261 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 03:16:43,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:43,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079917848] [2024-11-14 03:16:43,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079917848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:43,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:43,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:43,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156373290] [2024-11-14 03:16:43,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:43,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:16:43,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:16:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:16:43,265 INFO L87 Difference]: Start difference. First operand 29 states and 32 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 03:16:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:43,401 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-14 03:16:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:16:43,402 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 03:16:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:43,403 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:16:43,403 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 03:16:43,403 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 03:16:43,404 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:43,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 49 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 03:16:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 03:16:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-14 03:16:43,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 4 [2024-11-14 03:16:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:43,410 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-14 03:16:43,410 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 03:16:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-14 03:16:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:16:43,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:43,412 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:16:43,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:16:43,413 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 03:16:43,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 4860664, now seen corresponding path program 1 times [2024-11-14 03:16:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831417964] [2024-11-14 03:16:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:43,623 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 03:16:43,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:43,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831417964] [2024-11-14 03:16:43,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831417964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:43,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:43,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362886676] [2024-11-14 03:16:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:43,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:43,626 INFO L87 Difference]: Start difference. First operand 31 states and 35 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 03:16:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:43,684 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-14 03:16:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:43,685 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 03:16:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:43,685 INFO L225 Difference]: With dead ends: 30 [2024-11-14 03:16:43,686 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 03:16:43,686 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 03:16:43,687 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:43,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 03:16:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 03:16:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 2.0) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-14 03:16:43,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 4 [2024-11-14 03:16:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:43,691 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-14 03:16:43,691 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 03:16:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-14 03:16:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:16:43,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:43,692 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:16:43,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:16:43,692 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 03:16:43,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash 150680575, now seen corresponding path program 1 times [2024-11-14 03:16:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:43,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644893404] [2024-11-14 03:16:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:43,968 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 03:16:43,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644893404] [2024-11-14 03:16:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644893404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:43,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244731959] [2024-11-14 03:16:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:43,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:16:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:16:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:16:43,970 INFO L87 Difference]: Start difference. First operand 30 states and 34 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 03:16:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:44,034 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-14 03:16:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:44,036 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 03:16:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:44,037 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:16:44,037 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:16:44,037 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 03:16:44,038 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:44,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:16:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 03:16:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.9411764705882353) 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 03:16:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-14 03:16:44,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 5 [2024-11-14 03:16:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:44,044 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-14 03:16:44,044 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 03:16:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-14 03:16:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:16:44,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:44,045 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 03:16:44,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:16:44,045 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:44,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 373779531, now seen corresponding path program 1 times [2024-11-14 03:16:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426744183] [2024-11-14 03:16:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:44,404 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 03:16:44,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426744183] [2024-11-14 03:16:44,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426744183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206036310] [2024-11-14 03:16:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:44,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:44,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:44,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:16:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:44,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:16:44,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:44,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-14 03:16:44,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 03:16:44,885 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 03:16:44,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:45,115 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 03:16:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206036310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108272018] [2024-11-14 03:16:45,138 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:16:45,138 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:45,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:45,147 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:45,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:46,200 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:46,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '475#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_35| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_35| 2) |ULTIMATE.start_main_~length2~0#1|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_35|) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_35|))) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127))' at error location [2024-11-14 03:16:46,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:46,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 03:16:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934080109] [2024-11-14 03:16:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:46,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:16:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:16:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:16:46,931 INFO L87 Difference]: Start difference. First operand 29 states and 33 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 03:16:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:47,262 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-14 03:16:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:16:47,265 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 03:16:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:47,266 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:16:47,266 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:16:47,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2024-11-14 03:16:47,267 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:47,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:16:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:16:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-14 03:16:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-14 03:16:47,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6 [2024-11-14 03:16:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:47,274 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-14 03:16:47,274 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 03:16:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-14 03:16:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:16:47,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:47,275 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:16:47,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:16:47,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:47,479 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:47,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash 376132324, now seen corresponding path program 1 times [2024-11-14 03:16:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:47,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124786649] [2024-11-14 03:16:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:47,540 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 03:16:47,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:47,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124786649] [2024-11-14 03:16:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124786649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:47,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:47,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004448230] [2024-11-14 03:16:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:47,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:47,543 INFO L87 Difference]: Start difference. First operand 26 states and 29 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 03:16:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:47,615 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-14 03:16:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:47,616 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 03:16:47,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:47,616 INFO L225 Difference]: With dead ends: 24 [2024-11-14 03:16:47,616 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 03:16:47,616 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 03:16:47,617 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:47,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 03:16:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 03:16:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-14 03:16:47,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2024-11-14 03:16:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:47,624 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-14 03:16:47,624 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 03:16:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-14 03:16:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:16:47,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:47,624 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:16:47,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:16:47,625 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:47,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,625 INFO L85 PathProgramCache]: Analyzing trace with hash 376132325, now seen corresponding path program 1 times [2024-11-14 03:16:47,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:47,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301592682] [2024-11-14 03:16:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:47,758 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 03:16:47,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:47,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301592682] [2024-11-14 03:16:47,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301592682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:47,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:47,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:47,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999437835] [2024-11-14 03:16:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:47,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:16:47,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:16:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:16:47,760 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 03:16:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:47,856 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-14 03:16:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:47,857 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 03:16:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:47,858 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:16:47,858 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 03:16:47,858 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 03:16:47,859 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:47,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 03:16:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-14 03:16:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.8) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-14 03:16:47,866 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 6 [2024-11-14 03:16:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:47,866 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-14 03:16:47,866 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 03:16:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-14 03:16:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:16:47,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:47,866 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:47,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:16:47,867 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:47,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 685961561, now seen corresponding path program 1 times [2024-11-14 03:16:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690122906] [2024-11-14 03:16:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:47,933 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 03:16:47,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690122906] [2024-11-14 03:16:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690122906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:47,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011366091] [2024-11-14 03:16:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:47,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:47,935 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:47,984 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-14 03:16:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-14 03:16:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:47,986 INFO L225 Difference]: With dead ends: 26 [2024-11-14 03:16:47,986 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 03:16:47,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:47,987 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:47,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:16:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 03:16:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 03:16:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-14 03:16:47,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 8 [2024-11-14 03:16:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:47,993 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-14 03:16:47,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-14 03:16:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:16:47,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:47,994 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:47,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:16:47,994 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:47,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 685961562, now seen corresponding path program 1 times [2024-11-14 03:16:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:47,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577400011] [2024-11-14 03:16:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:48,172 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 03:16:48,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577400011] [2024-11-14 03:16:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577400011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:48,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:48,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:48,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983565962] [2024-11-14 03:16:48,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:48,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:48,173 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:48,251 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-14 03:16:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-14 03:16:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:48,252 INFO L225 Difference]: With dead ends: 28 [2024-11-14 03:16:48,252 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:16:48,252 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 03:16:48,253 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:48,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:16:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 03:16:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) 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 03:16:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-14 03:16:48,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 8 [2024-11-14 03:16:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:48,264 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-14 03:16:48,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-14 03:16:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:16:48,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:48,265 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:48,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:16:48,265 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:48,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2079253967, now seen corresponding path program 1 times [2024-11-14 03:16:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843967933] [2024-11-14 03:16:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:48,482 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 03:16:48,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843967933] [2024-11-14 03:16:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843967933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:48,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:48,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:16:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403829306] [2024-11-14 03:16:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:48,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:16:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:16:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:16:48,484 INFO L87 Difference]: Start difference. First operand 28 states and 33 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 03:16:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:48,533 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 03:16:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:16:48,534 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 03:16:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:48,534 INFO L225 Difference]: With dead ends: 27 [2024-11-14 03:16:48,534 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:16:48,535 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 03:16:48,535 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:48,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:16:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:16:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 03:16:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-14 03:16:48,541 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2024-11-14 03:16:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:48,541 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-14 03:16:48,541 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 03:16:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-14 03:16:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:16:48,545 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:48,545 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:48,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:16:48,545 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:48,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash 32386289, now seen corresponding path program 1 times [2024-11-14 03:16:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:48,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766222272] [2024-11-14 03:16:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:48,590 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 03:16:48,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:48,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766222272] [2024-11-14 03:16:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766222272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:48,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:48,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:16:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435850974] [2024-11-14 03:16:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:48,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:16:48,594 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:48,627 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-14 03:16:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 03:16:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:48,629 INFO L225 Difference]: With dead ends: 27 [2024-11-14 03:16:48,629 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 03:16:48,629 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 03:16:48,629 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 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 03:16:48,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:16:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 03:16:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 03:16:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-14 03:16:48,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2024-11-14 03:16:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:48,636 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-14 03:16:48,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-14 03:16:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:16:48,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:48,638 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:48,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:16:48,638 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:48,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 864451304, now seen corresponding path program 1 times [2024-11-14 03:16:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:48,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195129290] [2024-11-14 03:16:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:49,008 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 03:16:49,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195129290] [2024-11-14 03:16:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195129290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:49,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:16:49,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:16:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559456276] [2024-11-14 03:16:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:49,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:16:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:16:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:16:49,011 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 03:16:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:49,119 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-14 03:16:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:16:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 03:16:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:49,120 INFO L225 Difference]: With dead ends: 34 [2024-11-14 03:16:49,120 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:16:49,120 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 03:16:49,121 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:49,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:16:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-14 03:16:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-14 03:16:49,128 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 12 [2024-11-14 03:16:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:49,128 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-14 03:16:49,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 03:16:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-14 03:16:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 03:16:49,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:49,129 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:49,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:16:49,129 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:49,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1638422611, now seen corresponding path program 1 times [2024-11-14 03:16:49,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:49,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710112388] [2024-11-14 03:16:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:49,411 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 03:16:49,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710112388] [2024-11-14 03:16:49,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710112388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758576497] [2024-11-14 03:16:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:49,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:49,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:49,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:16:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:49,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:16:49,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:49,579 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 03:16:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:16:49,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:16:49,692 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 20 [2024-11-14 03:16:49,715 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 03:16:49,715 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758576497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:49,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:16:49,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 11 [2024-11-14 03:16:49,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203052512] [2024-11-14 03:16:49,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:49,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:16:49,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:16:49,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:16:49,717 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:49,847 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-14 03:16:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:16:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-14 03:16:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:49,848 INFO L225 Difference]: With dead ends: 35 [2024-11-14 03:16:49,848 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:16:49,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:16:49,849 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:49,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:16:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-14 03:16:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-14 03:16:49,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 14 [2024-11-14 03:16:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:49,852 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-14 03:16:49,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-14 03:16:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:16:49,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:49,852 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:49,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:16:50,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:16:50,057 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:50,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1989989699, now seen corresponding path program 1 times [2024-11-14 03:16:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369463904] [2024-11-14 03:16:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:50,315 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 03:16:50,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369463904] [2024-11-14 03:16:50,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369463904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47957915] [2024-11-14 03:16:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:50,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:50,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:50,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:16:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:50,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:16:50,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:50,601 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 38 treesize of output 30 [2024-11-14 03:16:50,687 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 03:16:50,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:50,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-11-14 03:16:50,859 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 26 treesize of output 20 [2024-11-14 03:16:50,901 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 03:16:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47957915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936630432] [2024-11-14 03:16:50,904 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:16:50,904 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:50,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:50,905 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:50,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:52,068 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:53,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_29| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_31| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|) (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_29| 1)) (< |v_ULTIMATE.start_subseq_~ps~0#1.offset_29| 0)) (or (and (<= 1 |ULTIMATE.start_subseq_~pt~0#1.offset|) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_30| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_28| Int)) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~ps~0#1.base_30|) 1) (<= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_28| 1) (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_30|)) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_29| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_28| 1)) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_28|) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_30| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|) (= (select (select |#memory_int| |ULTIMATE.start_subseq_~pt~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~pt~0#1.offset|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_30|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_28|)))) (= (select |#valid| |ULTIMATE.start_subseq_~pt~0#1.base|) 1) (<= |ULTIMATE.start_subseq_~pt~0#1.offset| (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|))) (and (exists ((|v_#memory_int_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_48| Int) (|v_ULTIMATE.start_main_~length2~0#1_53| Int)) (and (= |#memory_int| (store (store |v_#memory_int_53| |v_ULTIMATE.start_subseq_~ps~0#1.base_31| (store (select |v_#memory_int_53| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|) (+ (- 1) |v_ULTIMATE.start_main_~length1~0#1_48| |v_ULTIMATE.start_subseq_~ps~0#1.offset_29|) 0)) |ULTIMATE.start_subseq_~pt~0#1.base| (store (select (store |v_#memory_int_53| |v_ULTIMATE.start_subseq_~ps~0#1.base_31| (store (select |v_#memory_int_53| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|) (+ (- 1) |v_ULTIMATE.start_main_~length1~0#1_48| |v_ULTIMATE.start_subseq_~ps~0#1.offset_29|) 0)) |ULTIMATE.start_subseq_~pt~0#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_53| |ULTIMATE.start_subseq_~pt~0#1.offset|) 0))) (<= 1 (+ |v_ULTIMATE.start_main_~length1~0#1_48| |v_ULTIMATE.start_subseq_~ps~0#1.offset_29|)) (<= (+ |v_ULTIMATE.start_main_~length1~0#1_48| |v_ULTIMATE.start_subseq_~ps~0#1.offset_29|) (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_53| |ULTIMATE.start_subseq_~pt~0#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_53| |ULTIMATE.start_subseq_~pt~0#1.offset|) (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|)))) (= (select |#valid| |ULTIMATE.start_subseq_~pt~0#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_subseq_~ps~0#1.base_31|) 1)))))' at error location [2024-11-14 03:16:53,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:53,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:53,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2024-11-14 03:16:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139829397] [2024-11-14 03:16:53,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:53,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:16:53,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:16:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=562, Unknown=4, NotChecked=0, Total=650 [2024-11-14 03:16:53,771 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:53,974 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-14 03:16:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:16:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:16:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:53,975 INFO L225 Difference]: With dead ends: 38 [2024-11-14 03:16:53,976 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 03:16:53,976 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=607, Unknown=4, NotChecked=0, Total=702 [2024-11-14 03:16:53,977 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:53,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:16:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 03:16:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2024-11-14 03:16:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-14 03:16:53,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2024-11-14 03:16:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:53,981 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-14 03:16:53,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-14 03:16:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:16:53,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:53,982 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:54,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:54,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:16:54,186 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:54,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1119603918, now seen corresponding path program 1 times [2024-11-14 03:16:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:54,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906000686] [2024-11-14 03:16:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:54,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:54,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906000686] [2024-11-14 03:16:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906000686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:54,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987520850] [2024-11-14 03:16:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:54,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:54,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:54,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:16:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:54,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:16:54,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:54,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:55,008 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 03:16:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:55,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987520850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:55,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983724239] [2024-11-14 03:16:55,047 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:16:55,048 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:55,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:55,048 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:55,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:56,097 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:57,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1377#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_39| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_42| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| 1))) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_#memory_int_64| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_51| Int) (|v_ULTIMATE.start_main_~length2~0#1_57| Int)) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| |v_ULTIMATE.start_main_~length2~0#1_57|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| |v_ULTIMATE.start_main_~length2~0#1_57|)) (= (store (store |v_#memory_int_64| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_51|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_42| (store (select (store |v_#memory_int_64| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_51|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| |v_ULTIMATE.start_main_~length2~0#1_57|) 0)) |#memory_int|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_51|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_51|))))) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_39| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_33| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_25| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_35| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_25| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_33|) (or (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_33| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_35| |ULTIMATE.start_subseq_~ps~0#1.base|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_35|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_33|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_39|)))) (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_25| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_35| |ULTIMATE.start_subseq_~ps~0#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_25|) (= |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_33|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_35|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_33|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_42|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_39|)))))))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_39|))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:16:57,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:57,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:57,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-14 03:16:57,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057435389] [2024-11-14 03:16:57,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:57,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:16:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:16:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=563, Unknown=3, NotChecked=0, Total=650 [2024-11-14 03:16:57,297 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 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 03:16:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:57,492 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2024-11-14 03:16:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:16:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 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) Word has length 18 [2024-11-14 03:16:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:57,493 INFO L225 Difference]: With dead ends: 36 [2024-11-14 03:16:57,494 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 03:16:57,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=608, Unknown=3, NotChecked=0, Total=702 [2024-11-14 03:16:57,495 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:57,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:16:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 03:16:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-14 03:16:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-14 03:16:57,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2024-11-14 03:16:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:57,502 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-14 03:16:57,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 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 03:16:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-14 03:16:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:16:57,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:57,503 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:57,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:16:57,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:16:57,704 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:16:57,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1329795264, now seen corresponding path program 2 times [2024-11-14 03:16:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780298841] [2024-11-14 03:16:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:58,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780298841] [2024-11-14 03:16:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780298841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632502625] [2024-11-14 03:16:58,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:16:58,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:58,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:58,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:16:58,711 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:16:58,712 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:58,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:16:58,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:58,725 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 03:16:58,814 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 03:16:58,884 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 03:16:59,608 INFO L349 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2024-11-14 03:16:59,609 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 57 treesize of output 74 [2024-11-14 03:16:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:16:59,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:00,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:17:00,311 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 77 treesize of output 67 [2024-11-14 03:17:00,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:17:00,333 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 97 treesize of output 86 [2024-11-14 03:17:00,343 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 89 treesize of output 73 [2024-11-14 03:17:00,351 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 57 treesize of output 53 [2024-11-14 03:17:00,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-11-14 03:17:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632502625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600417434] [2024-11-14 03:17:00,567 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:00,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:00,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:00,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:00,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:01,454 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:03,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1609#(exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_43| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_41| Int)) (and (or (< |v_ULTIMATE.start_subseq_~ps~0#1.offset_41| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_43|) (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_41| 1))) (or (and (exists ((|v_ULTIMATE.start_main_~length2~0#1_60| Int) (|v_#memory_int_78| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_55| Int)) (and (<= (+ |v_ULTIMATE.start_main_~length2~0#1_60| |ULTIMATE.start_subseq_~pt~0#1.offset|) (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_main_~length1~0#1_55| |v_ULTIMATE.start_subseq_~ps~0#1.offset_41|)) (<= (+ |v_ULTIMATE.start_main_~length1~0#1_55| |v_ULTIMATE.start_subseq_~ps~0#1.offset_41|) (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_43|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_60| |ULTIMATE.start_subseq_~pt~0#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_78| |v_ULTIMATE.start_subseq_~ps~0#1.base_43| (store (select |v_#memory_int_78| |v_ULTIMATE.start_subseq_~ps~0#1.base_43|) (+ (- 1) |v_ULTIMATE.start_main_~length1~0#1_55| |v_ULTIMATE.start_subseq_~ps~0#1.offset_41|) 0)) |ULTIMATE.start_subseq_~pt~0#1.base| (store (select (store |v_#memory_int_78| |v_ULTIMATE.start_subseq_~ps~0#1.base_43| (store (select |v_#memory_int_78| |v_ULTIMATE.start_subseq_~ps~0#1.base_43|) (+ (- 1) |v_ULTIMATE.start_main_~length1~0#1_55| |v_ULTIMATE.start_subseq_~ps~0#1.offset_41|) 0)) |ULTIMATE.start_subseq_~pt~0#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_60| |ULTIMATE.start_subseq_~pt~0#1.offset|) 0))))) (= (select |#valid| |v_ULTIMATE.start_subseq_~ps~0#1.base_43|) 1) (= (select |#valid| |ULTIMATE.start_subseq_~pt~0#1.base|) 1)) (and (<= 1 |ULTIMATE.start_subseq_~pt~0#1.offset|) (= (select |#valid| |ULTIMATE.start_subseq_~pt~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_42| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_40| Int)) (and (<= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_40| 1) (select |#length| |v_ULTIMATE.start_subseq_~ps~0#1.base_42|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_40| 1) |v_ULTIMATE.start_subseq_~ps~0#1.offset_41|) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_40|) (= (select |#valid| |v_ULTIMATE.start_subseq_~ps~0#1.base_42|) 1) (= (select (select |#memory_int| |ULTIMATE.start_subseq_~pt~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~pt~0#1.offset|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_42|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_40|)) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_43| |v_ULTIMATE.start_subseq_~ps~0#1.base_42|))) (<= |ULTIMATE.start_subseq_~pt~0#1.offset| (select |#length| |ULTIMATE.start_subseq_~pt~0#1.base|))))))' at error location [2024-11-14 03:17:03,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:03,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:03,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-14 03:17:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682584144] [2024-11-14 03:17:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:03,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 03:17:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 03:17:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1389, Unknown=3, NotChecked=0, Total=1560 [2024-11-14 03:17:03,367 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 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 03:17:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:04,263 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-11-14 03:17:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:17:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 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 22 [2024-11-14 03:17:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:04,264 INFO L225 Difference]: With dead ends: 42 [2024-11-14 03:17:04,264 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 03:17:04,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=269, Invalid=1981, Unknown=6, NotChecked=0, Total=2256 [2024-11-14 03:17:04,266 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:04,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 03:17:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2024-11-14 03:17:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-14 03:17:04,275 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2024-11-14 03:17:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:04,275 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-14 03:17:04,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 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 03:17:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-14 03:17:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 03:17:04,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:04,276 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:04,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:17:04,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:17:04,476 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:04,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1966955403, now seen corresponding path program 2 times [2024-11-14 03:17:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705325050] [2024-11-14 03:17:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:04,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705325050] [2024-11-14 03:17:04,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705325050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540183700] [2024-11-14 03:17:04,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:04,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:04,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:04,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:17:05,064 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:17:05,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:05,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:17:05,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:05,113 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 03:17:05,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:17:05,359 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 03:17:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:05,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:05,909 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 03:17:05,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 03:17:05,923 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 03:17:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540183700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979171282] [2024-11-14 03:17:05,967 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:05,968 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:05,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:05,969 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:05,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:07,352 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:07,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:17:07,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:07,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:07,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-14 03:17:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536736272] [2024-11-14 03:17:07,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:07,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:17:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:17:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:17:07,969 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 03:17:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:09,280 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-11-14 03:17:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:17:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 24 [2024-11-14 03:17:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:09,281 INFO L225 Difference]: With dead ends: 53 [2024-11-14 03:17:09,281 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 03:17:09,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:17:09,282 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:09,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 03:17:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-11-14 03:17:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-14 03:17:09,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2024-11-14 03:17:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:09,286 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-14 03:17:09,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 03:17:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-14 03:17:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:17:09,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:09,287 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:09,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:17:09,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:09,487 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:09,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1817613794, now seen corresponding path program 3 times [2024-11-14 03:17:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682912061] [2024-11-14 03:17:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:09,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:11,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682912061] [2024-11-14 03:17:11,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682912061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178973612] [2024-11-14 03:17:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:11,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:11,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:11,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:17:11,531 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:11,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:11,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 03:17:11,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:11,746 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 03:17:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:11,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:11,860 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 03:17:11,862 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 16 treesize of output 12 [2024-11-14 03:17:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178973612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:11,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189935347] [2024-11-14 03:17:11,964 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:11,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:11,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:11,966 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:11,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:12,894 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:13,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2201#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:17:13,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:13,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 23 [2024-11-14 03:17:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267207748] [2024-11-14 03:17:13,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:13,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:17:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:17:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:17:13,592 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:14,675 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-11-14 03:17:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:17:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-14 03:17:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:14,676 INFO L225 Difference]: With dead ends: 77 [2024-11-14 03:17:14,676 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 03:17:14,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:17:14,677 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:14,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:17:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 03:17:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2024-11-14 03:17:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 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 03:17:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-11-14 03:17:14,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2024-11-14 03:17:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:14,681 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-11-14 03:17:14,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-11-14 03:17:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:17:14,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:14,682 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:14,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:17:14,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:14,886 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:14,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash -968007220, now seen corresponding path program 4 times [2024-11-14 03:17:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:14,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120911723] [2024-11-14 03:17:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:14,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:15,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120911723] [2024-11-14 03:17:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120911723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486259565] [2024-11-14 03:17:15,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:15,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:15,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:15,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:17:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:15,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:17:15,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:15,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:16,086 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 03:17:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486259565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475005032] [2024-11-14 03:17:16,153 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:16,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:16,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:16,155 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:16,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:16,799 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:17,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2565#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_77| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_74| Int)) (and (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_72| Int) (|v_#memory_int_116| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_64| Int)) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_64|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_64|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| |v_ULTIMATE.start_main_~length2~0#1_72|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| |v_ULTIMATE.start_main_~length2~0#1_72|)) (= |#memory_int| (store (store |v_#memory_int_116| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_116| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_64|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_77| (store (select (store |v_#memory_int_116| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_116| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_64|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| |v_ULTIMATE.start_main_~length2~0#1_72|) 0))))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.base_52| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_63| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_61| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_52| Int)) (and (or (and (= |v_ULTIMATE.start_subseq_~ps~0#1.base_63| |ULTIMATE.start_subseq_~ps~0#1.base|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_61| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_74|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_63|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_61|))) (and (= |v_ULTIMATE.start_subseq_~ps~0#1.base_63| |ULTIMATE.start_subseq_~ps~0#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_74|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_63|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_61|))) (= |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_61|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_52| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_52|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_61|))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_74|))) (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_77|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_74| 0)))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:17:17,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:17,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:17,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-14 03:17:17,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491704599] [2024-11-14 03:17:17,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:17,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:17:17,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:17:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=942, Unknown=1, NotChecked=0, Total=1056 [2024-11-14 03:17:17,939 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:18,237 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-11-14 03:17:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:17:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 03:17:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:18,238 INFO L225 Difference]: With dead ends: 49 [2024-11-14 03:17:18,238 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 03:17:18,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=998, Unknown=1, NotChecked=0, Total=1122 [2024-11-14 03:17:18,239 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:18,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 03:17:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-11-14 03:17:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 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 03:17:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-14 03:17:18,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 34 [2024-11-14 03:17:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:18,243 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-14 03:17:18,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-14 03:17:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:17:18,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:18,244 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:18,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:17:18,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:18,445 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:18,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash 439416719, now seen corresponding path program 5 times [2024-11-14 03:17:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:18,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010165490] [2024-11-14 03:17:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:19,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:19,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010165490] [2024-11-14 03:17:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010165490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931402716] [2024-11-14 03:17:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:19,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:19,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:17:19,276 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:17:19,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:19,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:17:19,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:19,375 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 03:17:20,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:17:20,040 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 03:17:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:20,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:20,759 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 03:17:20,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 03:17:20,772 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 22 treesize of output 20 [2024-11-14 03:17:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:20,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931402716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:20,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72226715] [2024-11-14 03:17:20,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:20,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:20,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:20,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:20,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:21,417 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:22,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2937#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_89| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_86| Int)) (and (or (and (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_70| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_68| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_59| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_59| Int)) (and (or (and (= |v_ULTIMATE.start_subseq_~ps~0#1.base_70| |ULTIMATE.start_subseq_~ps~0#1.base|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_70|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_68|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_86|))) (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_68| 1))) (and (= |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_68|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_59| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_70|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_68|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_86|)))) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_70| |ULTIMATE.start_subseq_~ps~0#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_59|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_68|))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_86|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) 1) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) 1) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_76| Int) (|v_ULTIMATE.start_main_~length1~0#1_67| Int) (|v_#memory_int_130| (Array Int (Array Int Int)))) (and (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| |v_ULTIMATE.start_main_~length2~0#1_76|)) (= |#memory_int| (store (store |v_#memory_int_130| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_130| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_67|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_89| (store (select (store |v_#memory_int_130| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_130| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_67|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| |v_ULTIMATE.start_main_~length2~0#1_76|) 0))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_67|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| |v_ULTIMATE.start_main_~length2~0#1_76|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_67|)))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_89|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_86| 0)))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:17:22,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:22,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2024-11-14 03:17:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535387109] [2024-11-14 03:17:22,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:22,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:17:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:17:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1653, Unknown=2, NotChecked=0, Total=1806 [2024-11-14 03:17:22,705 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:27,464 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2024-11-14 03:17:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:17:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 03:17:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:27,465 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:17:27,465 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 03:17:27,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=347, Invalid=3073, Unknown=2, NotChecked=0, Total=3422 [2024-11-14 03:17:27,468 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:27,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 126 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:17:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 03:17:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-14 03:17:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-14 03:17:27,472 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 40 [2024-11-14 03:17:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:27,472 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-14 03:17:27,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-14 03:17:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 03:17:27,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:27,474 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:27,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:17:27,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:17:27,674 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:27,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -688481924, now seen corresponding path program 6 times [2024-11-14 03:17:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213677981] [2024-11-14 03:17:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:28,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213677981] [2024-11-14 03:17:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213677981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948372808] [2024-11-14 03:17:28,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:28,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:28,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:28,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:17:28,600 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:28,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:28,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 03:17:28,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:28,801 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 03:17:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:28,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:28,979 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 03:17:28,985 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 03:17:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948372808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91823718] [2024-11-14 03:17:29,080 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:29,081 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:29,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:29,083 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:29,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:29,844 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:31,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3422#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_99| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_102| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_99|) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_78| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_67| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_67| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_76| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_76|) (or (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_78|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_76|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_99|)))) (= |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_76|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_67| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_67|) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_78| |ULTIMATE.start_subseq_~ps~0#1.base|)) (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_76| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_78|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_76|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_99|))) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_78| |ULTIMATE.start_subseq_~ps~0#1.base|))))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~length1~0#1_70| Int) (|v_ULTIMATE.start_main_~length2~0#1_80| Int) (|v_#memory_int_145| (Array Int (Array Int Int)))) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_70|)) (= |#memory_int| (store (store |v_#memory_int_145| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_145| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_70|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_102| (store (select (store |v_#memory_int_145| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_145| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_70|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| |v_ULTIMATE.start_main_~length2~0#1_80|) 0))) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| |v_ULTIMATE.start_main_~length2~0#1_80|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| |v_ULTIMATE.start_main_~length2~0#1_80|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_70|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_102|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_99| 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:17:31,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:31,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2024-11-14 03:17:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762793545] [2024-11-14 03:17:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:31,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:17:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:17:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1279, Unknown=1, NotChecked=0, Total=1406 [2024-11-14 03:17:31,202 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 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 03:17:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:31,694 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-14 03:17:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:17:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 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 48 [2024-11-14 03:17:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:31,695 INFO L225 Difference]: With dead ends: 85 [2024-11-14 03:17:31,695 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 03:17:31,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=174, Invalid=1717, Unknown=1, NotChecked=0, Total=1892 [2024-11-14 03:17:31,696 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:31,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 215 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 03:17:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-14 03:17:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 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 03:17:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-11-14 03:17:31,699 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2024-11-14 03:17:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:31,699 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-11-14 03:17:31,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 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 03:17:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-11-14 03:17:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:17:31,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:31,700 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:31,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:31,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:17:31,901 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:31,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash -214150810, now seen corresponding path program 7 times [2024-11-14 03:17:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959986486] [2024-11-14 03:17:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:32,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959986486] [2024-11-14 03:17:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959986486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789149646] [2024-11-14 03:17:32,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:32,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:32,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:32,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:32,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:17:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:32,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 03:17:32,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:33,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:33,498 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 03:17:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789149646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557372572] [2024-11-14 03:17:33,647 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:33,648 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:33,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:33,648 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:33,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:34,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:35,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3909#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:17:35,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:35,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:35,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 29 [2024-11-14 03:17:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387996367] [2024-11-14 03:17:35,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:35,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 03:17:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 03:17:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:17:35,361 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 30 states, 29 states have (on average 3.689655172413793) internal successors, (107), 30 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 03:17:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:35,790 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-11-14 03:17:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:17:35,790 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.689655172413793) internal successors, (107), 30 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 03:17:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:35,791 INFO L225 Difference]: With dead ends: 65 [2024-11-14 03:17:35,791 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 03:17:35,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:17:35,791 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:35,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 195 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:17:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 03:17:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-14 03:17:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-11-14 03:17:35,794 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2024-11-14 03:17:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:35,794 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-11-14 03:17:35,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.689655172413793) internal successors, (107), 30 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 03:17:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-11-14 03:17:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 03:17:35,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:35,796 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:35,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:35,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:35,996 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:35,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 544230313, now seen corresponding path program 8 times [2024-11-14 03:17:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943248121] [2024-11-14 03:17:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:36,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943248121] [2024-11-14 03:17:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943248121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510685105] [2024-11-14 03:17:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:36,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:36,740 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:17:37,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:17:37,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:37,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:17:37,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:37,194 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 03:17:38,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:17:38,161 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 03:17:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:38,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:39,403 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 03:17:39,411 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 03:17:39,417 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 03:17:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:39,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510685105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:39,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020145062] [2024-11-14 03:17:39,557 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:39,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:39,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:39,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:39,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:40,213 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:41,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4418#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_133| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_130| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_130| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_130| 0)) (or (and (exists ((|v_#memory_int_176| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_76| Int) (|v_ULTIMATE.start_main_~length2~0#1_88| Int)) (and (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_88| |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_76|)) (= |#memory_int| (store (store |v_#memory_int_176| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_176| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_76|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_133| (store (select (store |v_#memory_int_176| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_176| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_76|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_88| |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|) 0))) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_88| |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_76|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) 1)) (and (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.base_85| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_96| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_94| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_85| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_94|) (or (and (= |v_ULTIMATE.start_subseq_~ps~0#1.base_96| |ULTIMATE.start_subseq_~ps~0#1.base|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_94| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_96|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_94|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|)))) (and (= |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_94|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_96|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_94|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|)))) (= |v_ULTIMATE.start_subseq_~ps~0#1.base_96| |ULTIMATE.start_subseq_~ps~0#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_85|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_85| |ULTIMATE.start_subseq_#t~post7#1.base|))))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_130|) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_130| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_133|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:17:41,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:41,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:41,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2024-11-14 03:17:41,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706622376] [2024-11-14 03:17:41,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:41,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:17:41,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:17:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2536, Unknown=2, NotChecked=0, Total=2756 [2024-11-14 03:17:41,982 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 03:17:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:54,843 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2024-11-14 03:17:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:17:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 56 [2024-11-14 03:17:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:54,845 INFO L225 Difference]: With dead ends: 110 [2024-11-14 03:17:54,845 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 03:17:54,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=522, Invalid=4732, Unknown=2, NotChecked=0, Total=5256 [2024-11-14 03:17:54,847 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:54,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 255 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:17:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 03:17:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-14 03:17:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-11-14 03:17:54,852 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 56 [2024-11-14 03:17:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:54,852 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-11-14 03:17:54,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 03:17:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-11-14 03:17:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 03:17:54,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:54,853 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:54,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:17:55,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:55,054 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:55,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash -997532138, now seen corresponding path program 9 times [2024-11-14 03:17:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:55,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861899752] [2024-11-14 03:17:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:55,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:56,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:56,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861899752] [2024-11-14 03:17:56,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861899752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:56,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887039150] [2024-11-14 03:17:56,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:56,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:56,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:56,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:17:56,298 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:56,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:56,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 03:17:56,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:56,544 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 03:17:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:56,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:56,719 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 03:17:56,721 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 03:17:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:17:56,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887039150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:56,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907899416] [2024-11-14 03:17:56,811 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:17:56,811 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:56,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:56,811 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:56,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:57,799 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:58,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5057#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:17:58,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:58,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2024-11-14 03:17:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209587134] [2024-11-14 03:17:58,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:58,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:17:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:17:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:17:58,486 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:59,495 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-11-14 03:17:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:17:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 03:17:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:59,497 INFO L225 Difference]: With dead ends: 113 [2024-11-14 03:17:59,497 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 03:17:59,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:17:59,498 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:59,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 296 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:17:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 03:17:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-14 03:17:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-14 03:17:59,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2024-11-14 03:17:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:59,503 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-14 03:17:59,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-14 03:17:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 03:17:59,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:59,505 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:59,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:59,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:59,706 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:17:59,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -540573184, now seen corresponding path program 10 times [2024-11-14 03:17:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:59,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592601350] [2024-11-14 03:17:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:59,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:00,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592601350] [2024-11-14 03:18:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592601350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410259998] [2024-11-14 03:18:00,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:00,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:00,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:00,571 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:00,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:18:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:00,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:18:00,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:01,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:01,533 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 03:18:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410259998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436302914] [2024-11-14 03:18:01,693 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:01,693 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:01,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:01,693 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:01,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:02,566 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:03,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5694#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:18:03,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2024-11-14 03:18:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270155702] [2024-11-14 03:18:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:03,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:18:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:18:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:18:03,206 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 38 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:03,884 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-14 03:18:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:18:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-14 03:18:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:03,886 INFO L225 Difference]: With dead ends: 81 [2024-11-14 03:18:03,886 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 03:18:03,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=2095, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:18:03,888 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:03,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 378 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:18:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 03:18:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-11-14 03:18:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2024-11-14 03:18:03,892 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 66 [2024-11-14 03:18:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:03,893 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2024-11-14 03:18:03,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2024-11-14 03:18:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 03:18:03,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:03,894 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:03,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:04,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:18:04,095 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:04,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 911679683, now seen corresponding path program 11 times [2024-11-14 03:18:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294550654] [2024-11-14 03:18:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:05,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294550654] [2024-11-14 03:18:05,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294550654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135533074] [2024-11-14 03:18:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:05,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:05,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:05,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:18:05,468 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 03:18:05,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:05,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 03:18:05,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:05,748 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 03:18:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:05,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:05,966 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 03:18:05,969 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 03:18:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 38 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135533074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138917389] [2024-11-14 03:18:06,096 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:06,096 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:06,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:06,097 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:06,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:06,692 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:08,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6324#(and (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_190| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_187| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| 1))) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_187|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_130| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_128| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_119| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_119| Int)) (and (or (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_130|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_128|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_187|)))) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_119| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_119|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_130|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_128| |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_130|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_128|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_187|))) (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_128| 1)) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_130|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_128|))) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= 1 (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|))) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_#memory_int_228| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_100| Int) (|v_ULTIMATE.start_main_~length1~0#1_85| Int)) (and (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_85|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| |v_ULTIMATE.start_main_~length2~0#1_100|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| |v_ULTIMATE.start_main_~length2~0#1_100|)) (= (store (store |v_#memory_int_228| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_228| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_85|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_190| (store (select (store |v_#memory_int_228| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_228| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_85|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_190|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_187| |v_ULTIMATE.start_main_~length2~0#1_100|) 0)) |#memory_int|) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_85|)))) (= 1 (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_190|)))))))' at error location [2024-11-14 03:18:08,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:08,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2024-11-14 03:18:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341009853] [2024-11-14 03:18:08,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:08,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:18:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:18:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2004, Unknown=4, NotChecked=0, Total=2162 [2024-11-14 03:18:08,280 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 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 03:18:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:09,536 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2024-11-14 03:18:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 03:18:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 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 72 [2024-11-14 03:18:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:09,537 INFO L225 Difference]: With dead ends: 127 [2024-11-14 03:18:09,537 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 03:18:09,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=226, Invalid=2850, Unknown=4, NotChecked=0, Total=3080 [2024-11-14 03:18:09,539 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:09,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 392 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:18:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 03:18:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-11-14 03:18:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 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 03:18:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-11-14 03:18:09,544 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2024-11-14 03:18:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:09,544 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-11-14 03:18:09,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 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 03:18:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-11-14 03:18:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 03:18:09,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:09,547 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:09,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:18:09,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:18:09,747 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:09,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1859009197, now seen corresponding path program 12 times [2024-11-14 03:18:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576888423] [2024-11-14 03:18:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 36 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:11,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576888423] [2024-11-14 03:18:11,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576888423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519625325] [2024-11-14 03:18:11,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:18:11,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:11,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:11,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:11,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:18:11,417 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:11,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:11,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:18:11,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 49 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:12,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:12,558 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 03:18:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 49 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:13,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519625325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:13,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583600856] [2024-11-14 03:18:13,044 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:13,044 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:13,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:13,044 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:13,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:13,732 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:14,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7048#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:18:14,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:14,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 49 [2024-11-14 03:18:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376455745] [2024-11-14 03:18:14,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:14,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 03:18:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 03:18:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2024-11-14 03:18:14,894 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 51 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:15,686 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2024-11-14 03:18:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:18:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 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 03:18:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:15,687 INFO L225 Difference]: With dead ends: 89 [2024-11-14 03:18:15,687 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 03:18:15,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 171 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=495, Invalid=3411, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:18:15,689 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:15,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 328 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:18:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 03:18:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-11-14 03:18:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2024-11-14 03:18:15,693 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2024-11-14 03:18:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:15,693 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2024-11-14 03:18:15,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2024-11-14 03:18:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 03:18:15,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:15,695 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:15,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:18:15,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:18:15,895 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:15,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash 587850672, now seen corresponding path program 13 times [2024-11-14 03:18:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448547336] [2024-11-14 03:18:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:17,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448547336] [2024-11-14 03:18:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448547336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681284875] [2024-11-14 03:18:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:17,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:17,031 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:17,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:18:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:17,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 03:18:17,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:17,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:18:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:17,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:17,800 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 03:18:17,802 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 03:18:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 43 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:17,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681284875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912041482] [2024-11-14 03:18:17,918 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:17,918 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:17,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:17,919 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:17,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:18,517 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:20,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7746#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_233| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_230| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) 1) (exists ((|v_ULTIMATE.start_main_~length1~0#1_91| Int) (|v_ULTIMATE.start_main_~length2~0#1_108| Int) (|v_#memory_int_266| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| |v_ULTIMATE.start_main_~length2~0#1_108|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_91|)) (= |#memory_int| (store (store |v_#memory_int_266| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_266| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_91|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_233| (store (select (store |v_#memory_int_266| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_266| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_91|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| |v_ULTIMATE.start_main_~length2~0#1_108|) 0))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_91|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| |v_ULTIMATE.start_main_~length2~0#1_108|))))) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.offset_144| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_155| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_153| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_144| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_153|) (or (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_155|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_230|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_155|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_153|)) (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_153| 1))) (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_144| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_155|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_230|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_155|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_153|))) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_144|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_153| |ULTIMATE.start_subseq_~ps~0#1.offset|))))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_230|) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) 1))) (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_233|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_230| 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:18:20,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:20,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-11-14 03:18:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715800990] [2024-11-14 03:18:20,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:20,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:18:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:18:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2282, Unknown=2, NotChecked=0, Total=2450 [2024-11-14 03:18:20,229 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 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 03:18:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:21,721 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2024-11-14 03:18:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:18:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 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 80 [2024-11-14 03:18:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:21,722 INFO L225 Difference]: With dead ends: 141 [2024-11-14 03:18:21,723 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 03:18:21,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=246, Invalid=3292, Unknown=2, NotChecked=0, Total=3540 [2024-11-14 03:18:21,724 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:21,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 531 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:18:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 03:18:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-11-14 03:18:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-11-14 03:18:21,728 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2024-11-14 03:18:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:21,728 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-11-14 03:18:21,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 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 03:18:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-11-14 03:18:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:18:21,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:21,729 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:21,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:21,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:21,930 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:21,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:21,930 INFO L85 PathProgramCache]: Analyzing trace with hash 702903194, now seen corresponding path program 14 times [2024-11-14 03:18:21,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:21,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850278575] [2024-11-14 03:18:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:21,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 49 proven. 275 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:23,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850278575] [2024-11-14 03:18:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850278575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346740609] [2024-11-14 03:18:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:23,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:23,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:23,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:18:24,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 03:18:24,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:24,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:18:24,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 64 proven. 260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:24,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:25,877 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 03:18:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 64 proven. 260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:26,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346740609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566762862] [2024-11-14 03:18:26,175 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:26,176 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:26,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:26,176 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:26,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:26,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:28,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8546#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_255| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_252| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| 1))) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_252|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.offset_156| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_165| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_167| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_156| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_165|) (or (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_165| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_167|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_252|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_167|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_165|))) (and (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_165| |ULTIMATE.start_subseq_~ps~0#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_252|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_167|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_165|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_167|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_156| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_156|))))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) 1)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_112| Int) (|v_ULTIMATE.start_main_~length1~0#1_94| Int) (|v_#memory_int_285| (Array Int (Array Int Int)))) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_94|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_94|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (store (store |v_#memory_int_285| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_285| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_94|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_255| (store (select (store |v_#memory_int_285| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_285| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_94|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| |v_ULTIMATE.start_main_~length2~0#1_112|) 0)) |#memory_int|) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| |v_ULTIMATE.start_main_~length2~0#1_112|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_252| |v_ULTIMATE.start_main_~length2~0#1_112|)))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_255|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:18:28,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:28,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:28,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 54 [2024-11-14 03:18:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193375158] [2024-11-14 03:18:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:28,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 03:18:28,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 03:18:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=3776, Unknown=2, NotChecked=0, Total=4290 [2024-11-14 03:18:28,584 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 55 states, 54 states have (on average 4.111111111111111) internal successors, (222), 55 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:29,351 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-14 03:18:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:18:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.111111111111111) internal successors, (222), 55 states have internal predecessors, (222), 0 states have call successors, (0), 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 82 [2024-11-14 03:18:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:29,352 INFO L225 Difference]: With dead ends: 97 [2024-11-14 03:18:29,352 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 03:18:29,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 181 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=534, Invalid=3886, Unknown=2, NotChecked=0, Total=4422 [2024-11-14 03:18:29,354 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:29,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 377 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:18:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 03:18:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-11-14 03:18:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-11-14 03:18:29,358 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2024-11-14 03:18:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:29,358 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-11-14 03:18:29,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.111111111111111) internal successors, (222), 55 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-11-14 03:18:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 03:18:29,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:29,360 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:29,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:18:29,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-14 03:18:29,561 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:29,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1190917853, now seen corresponding path program 15 times [2024-11-14 03:18:29,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:29,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798742573] [2024-11-14 03:18:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:30,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798742573] [2024-11-14 03:18:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798742573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822709198] [2024-11-14 03:18:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:18:30,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:30,947 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:30,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:18:31,185 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:31,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:31,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 03:18:31,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:31,521 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 03:18:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:31,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:31,778 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 03:18:31,781 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 03:18:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:31,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822709198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:31,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910621437] [2024-11-14 03:18:31,902 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:31,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:31,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:31,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:31,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:32,382 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:34,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9311#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_278| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_275| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| 1))) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_#memory_int_305| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_97| Int) (|v_ULTIMATE.start_main_~length2~0#1_116| Int)) (and (= |#memory_int| (store (store |v_#memory_int_305| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_305| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_97|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_278| (store (select (store |v_#memory_int_305| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_305| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_97|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| |v_ULTIMATE.start_main_~length2~0#1_116|) 0))) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| |v_ULTIMATE.start_main_~length2~0#1_116|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_97|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| |v_ULTIMATE.start_main_~length2~0#1_116|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_97|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_275|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_275| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_178| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_169| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_169| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_180| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_178|) (or (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_169| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_275|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_180|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_178|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_180|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_169|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_178| |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_180|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_278|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_275|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_180|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_178|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_178| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|))))))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:18:34,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:34,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:34,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2024-11-14 03:18:34,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930110803] [2024-11-14 03:18:34,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:34,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 03:18:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 03:18:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2578, Unknown=2, NotChecked=0, Total=2756 [2024-11-14 03:18:34,014 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:35,583 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2024-11-14 03:18:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 03:18:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-14 03:18:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:35,584 INFO L225 Difference]: With dead ends: 155 [2024-11-14 03:18:35,584 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 03:18:35,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=3766, Unknown=2, NotChecked=0, Total=4032 [2024-11-14 03:18:35,586 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:35,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 603 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:18:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 03:18:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-11-14 03:18:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2024-11-14 03:18:35,594 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2024-11-14 03:18:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:35,594 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2024-11-14 03:18:35,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2024-11-14 03:18:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 03:18:35,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:35,595 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:35,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:18:35,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 03:18:35,796 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:35,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 57015495, now seen corresponding path program 16 times [2024-11-14 03:18:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718577112] [2024-11-14 03:18:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 64 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:36,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:36,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718577112] [2024-11-14 03:18:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718577112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:36,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942507701] [2024-11-14 03:18:36,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:36,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:36,784 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:36,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:18:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:36,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 03:18:36,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 81 proven. 319 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:37,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:38,262 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 03:18:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 81 proven. 319 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:38,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942507701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325908967] [2024-11-14 03:18:38,684 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:38,684 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:38,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:38,684 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:38,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:39,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:40,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10178#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:18:40,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:40,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:40,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 49 [2024-11-14 03:18:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794637413] [2024-11-14 03:18:40,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:40,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:18:40,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:18:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 03:18:40,327 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 50 states, 49 states have (on average 3.816326530612245) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:41,277 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2024-11-14 03:18:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 03:18:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.816326530612245) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-14 03:18:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:41,278 INFO L225 Difference]: With dead ends: 105 [2024-11-14 03:18:41,278 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 03:18:41,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:18:41,279 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:41,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 476 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:18:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 03:18:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2024-11-14 03:18:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 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 03:18:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2024-11-14 03:18:41,283 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 90 [2024-11-14 03:18:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:41,284 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2024-11-14 03:18:41,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.816326530612245) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2024-11-14 03:18:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:18:41,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:41,286 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:41,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:18:41,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:41,486 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:41,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2102777270, now seen corresponding path program 17 times [2024-11-14 03:18:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:41,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912725841] [2024-11-14 03:18:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:42,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912725841] [2024-11-14 03:18:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912725841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730229552] [2024-11-14 03:18:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:42,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:18:43,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:18:43,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:43,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 03:18:43,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:43,825 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 03:18:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:43,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:44,094 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 03:18:44,097 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 03:18:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 53 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:44,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730229552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:44,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942998192] [2024-11-14 03:18:44,232 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:44,232 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:44,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:44,233 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:44,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:44,841 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:46,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11009#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:18:46,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:46,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:46,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2024-11-14 03:18:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950250399] [2024-11-14 03:18:46,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:46,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 03:18:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 03:18:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2799, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:18:46,068 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:47,776 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2024-11-14 03:18:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 03:18:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-14 03:18:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:47,777 INFO L225 Difference]: With dead ends: 169 [2024-11-14 03:18:47,777 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 03:18:47,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 249 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=258, Invalid=4164, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 03:18:47,779 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:47,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 754 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:18:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 03:18:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2024-11-14 03:18:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.04) internal successors, (104), 101 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 03:18:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2024-11-14 03:18:47,782 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2024-11-14 03:18:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:47,783 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2024-11-14 03:18:47,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2024-11-14 03:18:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 03:18:47,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:47,784 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:47,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:18:47,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:47,985 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:47,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash 298624564, now seen corresponding path program 18 times [2024-11-14 03:18:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:47,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076771336] [2024-11-14 03:18:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 81 proven. 403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:49,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076771336] [2024-11-14 03:18:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076771336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590682389] [2024-11-14 03:18:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:18:49,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:49,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:49,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:18:49,604 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:49,604 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:49,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 03:18:49,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 100 proven. 384 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:50,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:51,153 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 03:18:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 100 proven. 384 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590682389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375842834] [2024-11-14 03:18:51,852 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:51,852 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:51,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:51,853 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:51,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:52,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:54,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11963#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_353| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_356| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| 0)) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~length1~0#1_106| Int) (|v_#memory_int_368| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_128| Int)) (and (= (store (store |v_#memory_int_368| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_368| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_106|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_356| (store (select (store |v_#memory_int_368| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_368| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_106|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| |v_ULTIMATE.start_main_~length2~0#1_128|) 0)) |#memory_int|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_106|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_106|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| |v_ULTIMATE.start_main_~length2~0#1_128|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| |v_ULTIMATE.start_main_~length2~0#1_128|))))) (and (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_222| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_213| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_213| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_224| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_224|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_222| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_224|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_222|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_353|)))) (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_224|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_213|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_224|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_222|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_353|)))) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_222| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_213| |ULTIMATE.start_subseq_#t~post7#1.base|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_222|))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_353|) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_353| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_356|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:18:54,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:54,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:54,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2024-11-14 03:18:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744560505] [2024-11-14 03:18:54,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:54,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-14 03:18:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-14 03:18:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=5278, Unknown=1, NotChecked=0, Total=6006 [2024-11-14 03:18:54,556 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 66 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 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 03:18:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:55,630 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-11-14 03:18:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:18:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 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 98 [2024-11-14 03:18:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:55,632 INFO L225 Difference]: With dead ends: 113 [2024-11-14 03:18:55,632 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 03:18:55,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=768, Invalid=5393, Unknown=1, NotChecked=0, Total=6162 [2024-11-14 03:18:55,634 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:55,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 497 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:18:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 03:18:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-11-14 03:18:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2024-11-14 03:18:55,639 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 98 [2024-11-14 03:18:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:55,639 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2024-11-14 03:18:55,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 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 03:18:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2024-11-14 03:18:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:18:55,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:55,641 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:18:55,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:55,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 03:18:55,842 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:18:55,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash 800411127, now seen corresponding path program 19 times [2024-11-14 03:18:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169726370] [2024-11-14 03:18:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:55,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:57,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169726370] [2024-11-14 03:18:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169726370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302458208] [2024-11-14 03:18:57,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:57,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:57,403 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:57,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:18:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:57,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-14 03:18:57,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:58,037 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 03:18:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:58,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:58,309 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 03:18:58,311 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 03:18:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:18:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302458208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387239110] [2024-11-14 03:18:58,431 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:18:58,431 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:58,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:58,432 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:58,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:58,836 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:00,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12863#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_383| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_380| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| 0)) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~length2~0#1_132| Int) (|v_#memory_int_390| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_109| Int)) (and (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| |v_ULTIMATE.start_main_~length2~0#1_132|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| |v_ULTIMATE.start_main_~length2~0#1_132|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|)) (= |#memory_int| (store (store |v_#memory_int_390| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_390| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_109|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_383| (store (select (store |v_#memory_int_390| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_390| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_109|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| |v_ULTIMATE.start_main_~length2~0#1_132|) 0))) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_109|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_109|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) 1)) (and (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_380| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|)) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_237| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_228| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_239| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_228| Int)) (and (or (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_237| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_239|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_380|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_239|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_237|))) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_380|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_239|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_237|))) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_237| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_228| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_228|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_239|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_237|))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_380|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_383|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:19:00,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:00,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-11-14 03:19:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481027466] [2024-11-14 03:19:00,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:00,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 03:19:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 03:19:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3225, Unknown=1, NotChecked=0, Total=3422 [2024-11-14 03:19:00,828 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:02,989 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2024-11-14 03:19:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 03:19:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-14 03:19:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:02,990 INFO L225 Difference]: With dead ends: 183 [2024-11-14 03:19:02,990 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 03:19:02,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=300, Invalid=4811, Unknown=1, NotChecked=0, Total=5112 [2024-11-14 03:19:02,992 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:02,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 843 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:19:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 03:19:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2024-11-14 03:19:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 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 03:19:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2024-11-14 03:19:02,996 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2024-11-14 03:19:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:02,997 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2024-11-14 03:19:02,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2024-11-14 03:19:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 03:19:03,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:03,000 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:03,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:19:03,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 03:19:03,201 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:03,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash -457555999, now seen corresponding path program 20 times [2024-11-14 03:19:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631180841] [2024-11-14 03:19:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 100 proven. 476 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:04,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631180841] [2024-11-14 03:19:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631180841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051013744] [2024-11-14 03:19:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:04,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:04,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:19:05,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-14 03:19:05,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:05,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 03:19:05,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 121 proven. 455 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:06,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:07,637 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 03:19:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 121 proven. 455 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051013744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635993139] [2024-11-14 03:19:08,030 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:08,030 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:08,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:08,031 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:08,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:08,482 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:10,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13894#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_408| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_411| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.offset_243| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_254| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_252| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_243| Int)) (and (or (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_254|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_252|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_408|))) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_252| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_254|)) (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_243|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_254|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_254|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_252|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_408|)))) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_243| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_252| |ULTIMATE.start_subseq_~ps~0#1.offset|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_252|))) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_408|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|))) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (exists ((|v_#memory_int_412| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_136| Int) (|v_ULTIMATE.start_main_~length1~0#1_112| Int)) (and (= |#memory_int| (store (store |v_#memory_int_412| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_412| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_112|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_411| (store (select (store |v_#memory_int_412| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_412| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_112|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| |v_ULTIMATE.start_main_~length2~0#1_136|) 0))) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| |v_ULTIMATE.start_main_~length2~0#1_136|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| |v_ULTIMATE.start_main_~length2~0#1_136|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_112|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_112|)))) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) 1))) (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_411|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_408| 0)))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:19:10,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:10,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:10,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 69 [2024-11-14 03:19:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554634624] [2024-11-14 03:19:10,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:10,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 03:19:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 03:19:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=5670, Unknown=1, NotChecked=0, Total=6480 [2024-11-14 03:19:10,563 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 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 03:19:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:11,421 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2024-11-14 03:19:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:19:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 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 106 [2024-11-14 03:19:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:11,423 INFO L225 Difference]: With dead ends: 121 [2024-11-14 03:19:11,423 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 03:19:11,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 238 SyntacticMatches, 26 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=837, Invalid=5804, Unknown=1, NotChecked=0, Total=6642 [2024-11-14 03:19:11,423 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:11,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 513 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:19:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 03:19:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-11-14 03:19:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2024-11-14 03:19:11,432 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 106 [2024-11-14 03:19:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:11,432 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2024-11-14 03:19:11,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.173913043478261) internal successors, (288), 70 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 03:19:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2024-11-14 03:19:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 03:19:11,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:11,435 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:11,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:19:11,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 03:19:11,635 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:11,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1243467292, now seen corresponding path program 21 times [2024-11-14 03:19:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938867034] [2024-11-14 03:19:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:13,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938867034] [2024-11-14 03:19:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938867034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451043071] [2024-11-14 03:19:13,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:19:13,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:13,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:13,071 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:13,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:19:13,683 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:19:13,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:13,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 03:19:13,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:14,216 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 03:19:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:14,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:14,591 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 03:19:14,593 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 03:19:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 63 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:14,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451043071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:14,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288180432] [2024-11-14 03:19:14,758 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:14,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:14,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:14,759 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:14,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:15,300 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:17,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14860#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_440| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_437| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| 0)) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~length1~0#1_115| Int) (|v_ULTIMATE.start_main_~length2~0#1_140| Int) (|v_#memory_int_435| (Array Int (Array Int Int)))) (and (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_115|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| |v_ULTIMATE.start_main_~length2~0#1_140|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| |v_ULTIMATE.start_main_~length2~0#1_140|)) (= |#memory_int| (store (store |v_#memory_int_435| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_435| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_115|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_440| (store (select (store |v_#memory_int_435| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_435| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_115|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| |v_ULTIMATE.start_main_~length2~0#1_140|) 0))) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_115|))))) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_437| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|)) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_437|) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_270| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_268| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_259| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_259| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_268| 1)) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_270|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_268|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_437|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_270|)) (and (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_268| |ULTIMATE.start_subseq_~ps~0#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_270|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_268|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_440|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_437|)))) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_259|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_259| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_270|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_268|))))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:19:17,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:17,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:17,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2024-11-14 03:19:17,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101745957] [2024-11-14 03:19:17,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:17,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:19:17,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:19:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3574, Unknown=2, NotChecked=0, Total=3782 [2024-11-14 03:19:17,085 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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 03:19:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:19,160 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2024-11-14 03:19:19,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 03:19:19,161 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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 112 [2024-11-14 03:19:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:19,161 INFO L225 Difference]: With dead ends: 197 [2024-11-14 03:19:19,162 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 03:19:19,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=318, Invalid=5380, Unknown=2, NotChecked=0, Total=5700 [2024-11-14 03:19:19,162 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 2980 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:19,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1020 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2980 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:19:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 03:19:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2024-11-14 03:19:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 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 03:19:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2024-11-14 03:19:19,165 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2024-11-14 03:19:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:19,166 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2024-11-14 03:19:19,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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 03:19:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2024-11-14 03:19:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:19:19,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:19,166 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:19,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:19:19,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 03:19:19,367 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:19,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 435395022, now seen corresponding path program 22 times [2024-11-14 03:19:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:19,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349036980] [2024-11-14 03:19:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 121 proven. 555 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:20,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:20,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349036980] [2024-11-14 03:19:20,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349036980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:20,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072097919] [2024-11-14 03:19:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:19:20,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:20,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:20,506 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:20,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:19:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:20,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 03:19:20,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 144 proven. 532 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:21,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:22,508 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 03:19:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 144 proven. 532 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072097919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393437651] [2024-11-14 03:19:23,108 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:23,108 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:23,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:23,109 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:23,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:23,609 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:25,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15955#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_470| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_467| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| 0)) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_467|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_286| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_275| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_284| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_275| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_284|) (or (and (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_284| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_275| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_286|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_286|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_284|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_467|)))) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_275|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_286|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_284|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_467|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_286|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_284| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|))))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) 1)) (and (exists ((|v_ULTIMATE.start_main_~length1~0#1_118| Int) (|v_ULTIMATE.start_main_~length2~0#1_144| Int) (|v_#memory_int_458| (Array Int (Array Int Int)))) (and (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| |v_ULTIMATE.start_main_~length2~0#1_144|)) (= |#memory_int| (store (store |v_#memory_int_458| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_458| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_118|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_470| (store (select (store |v_#memory_int_458| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_458| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_118|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| |v_ULTIMATE.start_main_~length2~0#1_144|) 0))) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_467| |v_ULTIMATE.start_main_~length2~0#1_144|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_118|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_118|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_470|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:19:25,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:25,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 61 [2024-11-14 03:19:25,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082114413] [2024-11-14 03:19:25,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:25,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 03:19:25,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 03:19:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=4719, Unknown=2, NotChecked=0, Total=5256 [2024-11-14 03:19:25,799 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 62 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 62 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:27,032 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2024-11-14 03:19:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:19:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 62 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-14 03:19:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:27,033 INFO L225 Difference]: With dead ends: 129 [2024-11-14 03:19:27,033 INFO L226 Difference]: Without dead ends: 127 [2024-11-14 03:19:27,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 270 SyntacticMatches, 28 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=565, Invalid=4835, Unknown=2, NotChecked=0, Total=5402 [2024-11-14 03:19:27,034 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:27,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 592 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:19:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-14 03:19:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2024-11-14 03:19:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2024-11-14 03:19:27,039 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 114 [2024-11-14 03:19:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:27,039 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2024-11-14 03:19:27,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 62 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2024-11-14 03:19:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 03:19:27,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:27,041 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:27,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:19:27,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:19:27,241 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:27,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1612293649, now seen corresponding path program 23 times [2024-11-14 03:19:27,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:27,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030482779] [2024-11-14 03:19:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:28,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:28,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030482779] [2024-11-14 03:19:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030482779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854743448] [2024-11-14 03:19:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:28,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:28,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:28,927 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:28,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:19:30,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-14 03:19:30,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:30,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-14 03:19:30,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:31,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:19:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:31,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:31,518 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 03:19:31,520 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 03:19:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854743448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533162450] [2024-11-14 03:19:31,656 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:31,656 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:31,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:31,656 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:31,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:32,506 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:33,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16988#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:19:33,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:33,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:33,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2024-11-14 03:19:33,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896034035] [2024-11-14 03:19:33,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:33,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:19:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:19:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3717, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:19:33,449 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:35,948 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2024-11-14 03:19:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 03:19:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2024-11-14 03:19:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:35,950 INFO L225 Difference]: With dead ends: 211 [2024-11-14 03:19:35,951 INFO L226 Difference]: Without dead ends: 127 [2024-11-14 03:19:35,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2024-11-14 03:19:35,952 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 3476 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:35,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1184 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3476 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 03:19:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-14 03:19:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-11-14 03:19:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2024-11-14 03:19:35,957 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 120 [2024-11-14 03:19:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:35,958 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2024-11-14 03:19:35,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2024-11-14 03:19:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 03:19:35,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:35,960 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:35,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:19:36,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:19:36,160 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:36,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 845251579, now seen corresponding path program 24 times [2024-11-14 03:19:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163088538] [2024-11-14 03:19:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 144 proven. 640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:38,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163088538] [2024-11-14 03:19:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163088538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:38,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103428995] [2024-11-14 03:19:38,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:19:38,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:38,115 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:38,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:19:38,808 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:19:38,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:38,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 03:19:38,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 169 proven. 615 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:40,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:41,433 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 03:19:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 169 proven. 615 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103428995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172046806] [2024-11-14 03:19:42,505 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:42,505 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:42,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:42,506 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:42,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:43,421 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:44,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18172#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:19:44,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:44,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 79 [2024-11-14 03:19:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697183336] [2024-11-14 03:19:44,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:44,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 03:19:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 03:19:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1015, Invalid=7175, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 03:19:44,455 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 81 states, 80 states have (on average 3.5625) internal successors, (285), 80 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:45,979 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2024-11-14 03:19:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 03:19:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 3.5625) internal successors, (285), 80 states have internal predecessors, (285), 0 states have call successors, (0), 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 122 [2024-11-14 03:19:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:45,980 INFO L225 Difference]: With dead ends: 137 [2024-11-14 03:19:45,980 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 03:19:45,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3466 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1064, Invalid=7308, Unknown=0, NotChecked=0, Total=8372 [2024-11-14 03:19:45,981 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:45,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 863 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:19:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 03:19:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-11-14 03:19:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 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 03:19:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2024-11-14 03:19:45,984 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2024-11-14 03:19:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:45,985 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2024-11-14 03:19:45,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 3.5625) internal successors, (285), 80 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2024-11-14 03:19:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:19:45,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:45,985 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:46,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:19:46,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:46,186 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:46,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1902672510, now seen corresponding path program 25 times [2024-11-14 03:19:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34884524] [2024-11-14 03:19:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:48,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34884524] [2024-11-14 03:19:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34884524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648908458] [2024-11-14 03:19:48,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:19:48,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:48,175 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:48,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:19:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:48,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-14 03:19:48,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:48,987 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 03:19:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:49,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:49,411 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 03:19:49,415 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 03:19:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 73 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:49,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648908458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:49,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910146000] [2024-11-14 03:19:49,667 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:19:49,667 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:49,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:49,668 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:49,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:50,185 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:51,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19271#(and (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|) (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_565| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_568| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| 1))) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_340| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_329| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_329| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_338| Int)) (and (or (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_329| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_338| |ULTIMATE.start_subseq_~ps~0#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_565|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_340|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_338|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_340|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_329|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_565|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_340|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_338|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_338| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_340|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_338|))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_565|)) (and (exists ((|v_ULTIMATE.start_main_~length1~0#1_127| Int) (|v_ULTIMATE.start_main_~length2~0#1_156| Int) (|v_#memory_int_532| (Array Int (Array Int Int)))) (and (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_127|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| |v_ULTIMATE.start_main_~length2~0#1_156|)) (= |#memory_int| (store (store |v_#memory_int_532| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_532| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_127|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_568| (store (select (store |v_#memory_int_532| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_532| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_127|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| |v_ULTIMATE.start_main_~length2~0#1_156|) 0))) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_127|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_565| |v_ULTIMATE.start_main_~length2~0#1_156|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|)))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_568|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))))' at error location [2024-11-14 03:19:51,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:51,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:51,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2024-11-14 03:19:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129252332] [2024-11-14 03:19:51,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:51,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 03:19:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 03:19:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4329, Unknown=1, NotChecked=0, Total=4556 [2024-11-14 03:19:51,915 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:54,996 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2024-11-14 03:19:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 03:19:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-14 03:19:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:54,998 INFO L225 Difference]: With dead ends: 225 [2024-11-14 03:19:54,998 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 03:19:54,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=354, Invalid=6617, Unknown=1, NotChecked=0, Total=6972 [2024-11-14 03:19:54,999 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:54,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1169 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 03:19:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 03:19:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2024-11-14 03:19:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 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 03:19:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-11-14 03:19:55,003 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2024-11-14 03:19:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:55,003 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-11-14 03:19:55,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-11-14 03:19:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 03:19:55,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:55,004 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:55,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:19:55,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:55,205 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:19:55,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1492070808, now seen corresponding path program 26 times [2024-11-14 03:19:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:55,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115505815] [2024-11-14 03:19:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:55,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 169 proven. 731 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:19:57,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:57,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115505815] [2024-11-14 03:19:57,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115505815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:57,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473747119] [2024-11-14 03:19:57,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:57,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:57,499 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:57,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:19:58,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 03:19:58,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:58,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 03:19:58,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 196 proven. 704 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:00,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:02,061 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 03:20:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 196 proven. 704 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473747119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885936206] [2024-11-14 03:20:02,584 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:20:02,585 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:02,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:02,585 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:02,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:02,983 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:05,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20533#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_599| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_602| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| 0)) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) 1) (exists ((|v_#memory_int_557| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_130| Int) (|v_ULTIMATE.start_main_~length2~0#1_160| Int)) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| |v_ULTIMATE.start_main_~length2~0#1_160|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| |v_ULTIMATE.start_main_~length2~0#1_160|)) (= |#memory_int| (store (store |v_#memory_int_557| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_557| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_130|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_602| (store (select (store |v_#memory_int_557| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_557| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_130|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| |v_ULTIMATE.start_main_~length2~0#1_160|) 0))) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_130|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_130|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_356| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_358| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_347| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_347| Int)) (and (or (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_358|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_356|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_599|))) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_356| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_358|)) (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_347|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_358|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_356| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_347| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_358|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_356|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_599|)))))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_356|))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_599|) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_599| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_602|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:20:05,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:05,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:05,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 84 [2024-11-14 03:20:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814582554] [2024-11-14 03:20:05,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:05,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-14 03:20:05,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-14 03:20:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=7945, Unknown=2, NotChecked=0, Total=9120 [2024-11-14 03:20:05,097 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:06,306 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2024-11-14 03:20:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 03:20:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 states have internal predecessors, (354), 0 states have call successors, (0), 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 130 [2024-11-14 03:20:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:06,307 INFO L225 Difference]: With dead ends: 145 [2024-11-14 03:20:06,308 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 03:20:06,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 295 SyntacticMatches, 32 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6211 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1207, Invalid=8103, Unknown=2, NotChecked=0, Total=9312 [2024-11-14 03:20:06,309 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:06,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 713 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:20:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 03:20:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2024-11-14 03:20:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2024-11-14 03:20:06,313 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2024-11-14 03:20:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:06,313 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2024-11-14 03:20:06,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2024-11-14 03:20:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 03:20:06,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:06,314 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:06,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 03:20:06,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:06,515 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:20:06,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2046787371, now seen corresponding path program 27 times [2024-11-14 03:20:06,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:20:06,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710925961] [2024-11-14 03:20:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:06,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:20:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:08,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:20:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710925961] [2024-11-14 03:20:08,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710925961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:20:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742854689] [2024-11-14 03:20:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:20:08,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:20:08,115 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:20:08,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 03:20:08,548 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:20:08,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:20:08,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-14 03:20:08,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:09,164 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 03:20:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:09,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:09,543 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 03:20:09,546 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 03:20:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 78 proven. 915 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:09,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742854689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600619012] [2024-11-14 03:20:09,769 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:20:09,769 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:09,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:09,769 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:09,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:10,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:11,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21700#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:20:11,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:11,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:11,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2024-11-14 03:20:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825229953] [2024-11-14 03:20:11,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:11,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:20:11,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:20:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4487, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 03:20:11,534 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:14,291 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2024-11-14 03:20:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 03:20:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-11-14 03:20:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:14,292 INFO L225 Difference]: With dead ends: 239 [2024-11-14 03:20:14,293 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 03:20:14,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=327, Invalid=6983, Unknown=0, NotChecked=0, Total=7310 [2024-11-14 03:20:14,293 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 4078 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 4094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:14,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1338 Invalid, 4094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4078 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 03:20:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 03:20:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-11-14 03:20:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 141 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 03:20:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2024-11-14 03:20:14,297 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2024-11-14 03:20:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:14,297 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2024-11-14 03:20:14,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2024-11-14 03:20:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 03:20:14,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:14,298 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:14,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-14 03:20:14,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:14,502 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:20:14,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1043482901, now seen corresponding path program 28 times [2024-11-14 03:20:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:20:14,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358186130] [2024-11-14 03:20:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:20:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 196 proven. 828 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:15,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:20:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358186130] [2024-11-14 03:20:15,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358186130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:20:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458460574] [2024-11-14 03:20:15,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:20:15,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:15,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:20:15,934 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:20:15,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:20:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:16,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-14 03:20:16,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 225 proven. 799 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:17,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:18,665 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 03:20:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 225 proven. 799 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458460574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076338272] [2024-11-14 03:20:19,337 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:20:19,337 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:19,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:19,337 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:19,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:20,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:21,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23021#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:20:21,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:21,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:21,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 73 [2024-11-14 03:20:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969556044] [2024-11-14 03:20:21,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:21,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-14 03:20:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-14 03:20:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=6229, Unknown=0, NotChecked=0, Total=6972 [2024-11-14 03:20:21,159 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 74 states, 73 states have (on average 3.8767123287671232) internal successors, (283), 74 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 03:20:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:22,916 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2024-11-14 03:20:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 03:20:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.8767123287671232) internal successors, (283), 74 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 138 [2024-11-14 03:20:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:22,917 INFO L225 Difference]: With dead ends: 153 [2024-11-14 03:20:22,917 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 03:20:22,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 348 SyntacticMatches, 17 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 03:20:22,918 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:22,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 979 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 03:20:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 03:20:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-11-14 03:20:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2024-11-14 03:20:22,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2024-11-14 03:20:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:22,922 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2024-11-14 03:20:22,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.8767123287671232) internal successors, (283), 74 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 03:20:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2024-11-14 03:20:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:20:22,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:22,923 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:22,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 03:20:23,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:23,123 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:20:23,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -332168168, now seen corresponding path program 29 times [2024-11-14 03:20:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:20:23,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234768412] [2024-11-14 03:20:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:23,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:20:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 83 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:24,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:20:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234768412] [2024-11-14 03:20:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234768412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:20:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315811353] [2024-11-14 03:20:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:20:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:20:24,843 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:20:24,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 03:20:26,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 03:20:26,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:20:26,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-14 03:20:26,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:26,823 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 03:20:39,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:20:39,170 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 03:20:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 225 proven. 898 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:39,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:43,897 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 03:20:43,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 03:20:43,907 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 03:20:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 225 proven. 898 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:20:44,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315811353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:44,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1353474317] [2024-11-14 03:20:44,583 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:20:44,583 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:44,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:44,583 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:44,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:44,987 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:48,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24289#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_710| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_713| Int)) (and (or (and (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|)) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.base_407| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_418| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_416| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_407| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_416|) (or (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_407| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_416| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_407|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_418|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_710|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_418|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_416|)))) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_710|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_418|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_416|)) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_418|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_416| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|))))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_710|) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) 1)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_#memory_int_636| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_139| Int) (|v_ULTIMATE.start_main_~length2~0#1_172| Int)) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| |v_ULTIMATE.start_main_~length2~0#1_172|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| |v_ULTIMATE.start_main_~length2~0#1_172|)) (= (store (store |v_#memory_int_636| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_636| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_139|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_713| (store (select (store |v_#memory_int_636| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_636| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_139|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| |v_ULTIMATE.start_main_~length2~0#1_172|) 0)) |#memory_int|) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_139|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_139|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) 1))) (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_713|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_710| 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:20:48,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:48,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 97 [2024-11-14 03:20:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099599868] [2024-11-14 03:20:48,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:48,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 03:20:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 03:20:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=10610, Unknown=3, NotChecked=0, Total=11556 [2024-11-14 03:20:48,403 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 97 states, 97 states have (on average 4.061855670103093) internal successors, (394), 97 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:22,392 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 03:22:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:22:35,094 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2024-11-14 03:22:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-14 03:22:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.061855670103093) internal successors, (394), 97 states have internal predecessors, (394), 0 states have call successors, (0), 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 144 [2024-11-14 03:22:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:22:35,095 INFO L225 Difference]: With dead ends: 264 [2024-11-14 03:22:35,095 INFO L226 Difference]: Without dead ends: 160 [2024-11-14 03:22:35,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 329 SyntacticMatches, 34 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8726 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=2269, Invalid=20077, Unknown=4, NotChecked=0, Total=22350 [2024-11-14 03:22:35,098 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 377 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:22:35,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1153 Invalid, 3868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3766 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-11-14 03:22:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-14 03:22:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2024-11-14 03:22:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.025974025974026) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2024-11-14 03:22:35,103 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 144 [2024-11-14 03:22:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:22:35,104 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2024-11-14 03:22:35,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.061855670103093) internal successors, (394), 97 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2024-11-14 03:22:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 03:22:35,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:22:35,105 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:22:35,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 03:22:35,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 03:22:35,306 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:22:35,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:22:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash -243443387, now seen corresponding path program 30 times [2024-11-14 03:22:35,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:22:35,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891783325] [2024-11-14 03:22:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:22:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:22:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 88 proven. 1173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:37,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:22:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891783325] [2024-11-14 03:22:37,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891783325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:22:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029565772] [2024-11-14 03:22:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:22:37,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:22:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:22:37,914 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:22:37,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 03:22:40,084 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:22:40,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:22:40,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-14 03:22:40,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:22:41,076 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 03:22:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 88 proven. 1173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:41,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:22:41,501 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 03:22:41,503 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 03:22:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 88 proven. 1173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:41,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029565772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:22:41,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474674704] [2024-11-14 03:22:41,703 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:22:41,703 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:22:41,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:22:41,703 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:22:41,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:22:42,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:22:44,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25775#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:22:44,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:22:44,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:22:44,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2024-11-14 03:22:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281674647] [2024-11-14 03:22:44,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:22:44,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 03:22:44,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 03:22:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5473, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:22:44,480 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:22:49,274 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2024-11-14 03:22:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 03:22:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 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 152 [2024-11-14 03:22:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:22:49,276 INFO L225 Difference]: With dead ends: 267 [2024-11-14 03:22:49,276 INFO L226 Difference]: Without dead ends: 159 [2024-11-14 03:22:49,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 403 SyntacticMatches, 18 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=363, Invalid=8567, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 03:22:49,277 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 5905 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 5923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:22:49,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1998 Invalid, 5923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5905 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 03:22:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-14 03:22:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2024-11-14 03:22:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2024-11-14 03:22:49,279 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2024-11-14 03:22:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:22:49,279 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2024-11-14 03:22:49,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:22:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2024-11-14 03:22:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-14 03:22:49,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:22:49,280 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:22:49,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 03:22:49,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 03:22:49,481 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:22:49,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:22:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash 742592303, now seen corresponding path program 31 times [2024-11-14 03:22:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:22:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942065422] [2024-11-14 03:22:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:22:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:22:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 256 proven. 1040 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:51,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:22:51,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942065422] [2024-11-14 03:22:51,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942065422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:22:51,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788014727] [2024-11-14 03:22:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:22:51,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:22:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:22:51,591 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:22:51,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 03:22:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:51,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 03:22:51,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:22:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 289 proven. 1007 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:53,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:22:54,852 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 03:22:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 289 proven. 1007 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:22:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788014727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:22:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731133268] [2024-11-14 03:22:55,690 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:22:55,690 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:22:55,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:22:55,691 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:22:55,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:22:56,095 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:22:58,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27249#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_794| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_791| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (exists ((|v_ULTIMATE.start_main_~length2~0#1_180| Int) (|v_#memory_int_692| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_145| Int)) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_145|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_145|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| |v_ULTIMATE.start_main_~length2~0#1_180|)) (= (store (store |v_#memory_int_692| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_692| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_145|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_794| (store (select (store |v_#memory_int_692| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_692| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_145|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| |v_ULTIMATE.start_main_~length2~0#1_180|) 0)) |#memory_int|) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| |v_ULTIMATE.start_main_~length2~0#1_180|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|)))) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_462| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_451| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_460| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_451| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_460| 1)) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_462|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_460|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_791|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_462|)) (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_451|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_462|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_462|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_460|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_791|)))) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_451| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_460| |ULTIMATE.start_subseq_~ps~0#1.offset|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_460|))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_791|) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))) (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_794|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_791| 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:22:58,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:22:58,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:22:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 81 [2024-11-14 03:22:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431834055] [2024-11-14 03:22:58,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:22:58,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 03:22:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 03:22:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=7660, Unknown=2, NotChecked=0, Total=8556 [2024-11-14 03:22:58,863 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 82 states, 81 states have (on average 3.888888888888889) internal successors, (315), 82 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:01,597 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2024-11-14 03:23:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 03:23:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.888888888888889) internal successors, (315), 82 states have internal predecessors, (315), 0 states have call successors, (0), 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 154 [2024-11-14 03:23:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:01,599 INFO L225 Difference]: With dead ends: 169 [2024-11-14 03:23:01,599 INFO L226 Difference]: Without dead ends: 167 [2024-11-14 03:23:01,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 370 SyntacticMatches, 38 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6171 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=934, Invalid=7806, Unknown=2, NotChecked=0, Total=8742 [2024-11-14 03:23:01,600 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:01,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1382 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-14 03:23:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-14 03:23:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2024-11-14 03:23:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2024-11-14 03:23:01,606 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 154 [2024-11-14 03:23:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:01,606 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2024-11-14 03:23:01,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.888888888888889) internal successors, (315), 82 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2024-11-14 03:23:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 03:23:01,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:01,608 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:01,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 03:23:01,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 03:23:01,809 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:23:01,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2138689202, now seen corresponding path program 32 times [2024-11-14 03:23:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072387550] [2024-11-14 03:23:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:04,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072387550] [2024-11-14 03:23:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072387550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847622301] [2024-11-14 03:23:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:04,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:04,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:04,046 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:04,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 03:23:06,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 03:23:06,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:06,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-14 03:23:06,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:07,312 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 03:23:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:07,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:07,806 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 03:23:07,808 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 03:23:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 93 proven. 1314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847622301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:08,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131256723] [2024-11-14 03:23:08,008 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:23:08,008 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:08,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:08,008 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:08,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:08,409 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:10,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28617#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_832| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_835| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| 1))) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_832|) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_484| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_473| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_482| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_473| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_482|) (or (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_832|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_484|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_482|))) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_473|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_482| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_473| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_484|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_832|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_484|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_482|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_482| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_484|))))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|))) (and (exists ((|v_ULTIMATE.start_main_~length1~0#1_148| Int) (|v_ULTIMATE.start_main_~length2~0#1_184| Int) (|v_#memory_int_721| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| |v_ULTIMATE.start_main_~length2~0#1_184|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| |v_ULTIMATE.start_main_~length2~0#1_184|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_148|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_148|)) (= |#memory_int| (store (store |v_#memory_int_721| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_721| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_148|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_835| (store (select (store |v_#memory_int_721| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_721| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_148|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_832| |v_ULTIMATE.start_main_~length2~0#1_184|) 0))))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_835|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:23:10,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:10,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:10,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 68 [2024-11-14 03:23:10,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079450601] [2024-11-14 03:23:10,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:10,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 03:23:10,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 03:23:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=6054, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:23:10,709 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 68 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:15,488 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2024-11-14 03:23:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-14 03:23:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 68 states have internal predecessors, (212), 0 states have call successors, (0), 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 160 [2024-11-14 03:23:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:15,490 INFO L225 Difference]: With dead ends: 281 [2024-11-14 03:23:15,490 INFO L226 Difference]: Without dead ends: 167 [2024-11-14 03:23:15,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=426, Invalid=9474, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 03:23:15,492 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 5919 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 5938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:15,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2008 Invalid, 5938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5919 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 03:23:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-14 03:23:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2024-11-14 03:23:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 1.024390243902439) internal successors, (168), 165 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 03:23:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2024-11-14 03:23:15,496 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 160 [2024-11-14 03:23:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:15,497 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2024-11-14 03:23:15,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 68 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2024-11-14 03:23:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-14 03:23:15,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:15,498 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:15,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 03:23:15,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 03:23:15,699 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:23:15,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 239598236, now seen corresponding path program 33 times [2024-11-14 03:23:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601902491] [2024-11-14 03:23:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 289 proven. 1155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:18,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601902491] [2024-11-14 03:23:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601902491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281041557] [2024-11-14 03:23:18,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:23:18,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:18,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:18,244 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:18,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 03:23:19,549 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:23:19,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:19,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-14 03:23:19,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 324 proven. 1120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:21,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:23,254 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 03:23:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 324 proven. 1120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281041557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641704477] [2024-11-14 03:23:24,883 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:23:24,883 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:24,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:24,883 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:24,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:25,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:27,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30188#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:23:27,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:27,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:27,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 104 [2024-11-14 03:23:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343734133] [2024-11-14 03:23:27,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:27,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-14 03:23:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-14 03:23:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1680, Invalid=11660, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:23:27,132 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 106 states, 105 states have (on average 3.5714285714285716) internal successors, (375), 105 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:30,000 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2024-11-14 03:23:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 03:23:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 3.5714285714285716) internal successors, (375), 105 states have internal predecessors, (375), 0 states have call successors, (0), 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 162 [2024-11-14 03:23:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:30,001 INFO L225 Difference]: With dead ends: 177 [2024-11-14 03:23:30,001 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 03:23:30,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5701 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1744, Invalid=11828, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 03:23:30,002 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:30,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1357 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3879 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-14 03:23:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 03:23:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2024-11-14 03:23:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 171 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 03:23:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2024-11-14 03:23:30,004 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 162 [2024-11-14 03:23:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:30,004 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2024-11-14 03:23:30,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 3.5714285714285716) internal successors, (375), 105 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2024-11-14 03:23:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-14 03:23:30,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:30,005 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:30,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 03:23:30,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 03:23:30,206 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:23:30,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1393970081, now seen corresponding path program 34 times [2024-11-14 03:23:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088912816] [2024-11-14 03:23:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:32,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:32,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088912816] [2024-11-14 03:23:32,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088912816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:32,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395100955] [2024-11-14 03:23:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:23:32,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:32,733 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:32,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 03:23:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:33,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-14 03:23:33,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:34,192 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 03:23:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:34,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:34,711 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 03:23:34,713 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 03:23:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 98 proven. 1463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:34,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395100955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:34,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001581331] [2024-11-14 03:23:34,895 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:23:34,895 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:34,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:34,896 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:34,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:35,320 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:37,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31622#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_921| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_918| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| 0)) (or (and (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.base_519| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_519| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_528| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_530| Int)) (and (or (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_918|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_530|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_528|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_528| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_530|)) (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_519| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_519|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_528| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_530|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_918|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_530|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_528|))))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_528|))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) 1) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_918|)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~length1~0#1_154| Int) (|v_#memory_int_781| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_192| Int)) (and (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_154|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| |v_ULTIMATE.start_main_~length2~0#1_192|)) (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| |v_ULTIMATE.start_main_~length2~0#1_192|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_154|)) (= |#memory_int| (store (store |v_#memory_int_781| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_781| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_154|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_921| (store (select (store |v_#memory_int_781| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_781| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_154|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_918| |v_ULTIMATE.start_main_~length2~0#1_192|) 0))))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_921|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:23:37,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:37,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:37,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2024-11-14 03:23:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364813753] [2024-11-14 03:23:37,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:37,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-14 03:23:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-14 03:23:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=6529, Unknown=1, NotChecked=0, Total=6806 [2024-11-14 03:23:37,624 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:43,027 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2024-11-14 03:23:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 03:23:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 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 168 [2024-11-14 03:23:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:43,028 INFO L225 Difference]: With dead ends: 295 [2024-11-14 03:23:43,028 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 03:23:43,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=444, Invalid=10267, Unknown=1, NotChecked=0, Total=10712 [2024-11-14 03:23:43,029 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 6916 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 6936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:43,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2366 Invalid, 6936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6916 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 03:23:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 03:23:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2024-11-14 03:23:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 173 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 03:23:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2024-11-14 03:23:43,034 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 168 [2024-11-14 03:23:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:43,034 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2024-11-14 03:23:43,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2024-11-14 03:23:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-14 03:23:43,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:43,035 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:43,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 03:23:43,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:43,240 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:23:43,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1830136247, now seen corresponding path program 35 times [2024-11-14 03:23:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:43,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233042655] [2024-11-14 03:23:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 324 proven. 1276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:45,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233042655] [2024-11-14 03:23:45,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233042655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043449544] [2024-11-14 03:23:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:45,817 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:45,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 03:23:47,386 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 03:23:47,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:47,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-14 03:23:47,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 361 proven. 1239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:50,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:52,629 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 03:23:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 361 proven. 1239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:23:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043449544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800856463] [2024-11-14 03:23:53,722 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:23:53,723 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:53,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:53,723 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:53,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:54,268 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:57,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33269#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_962| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_965| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| 1))) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_962|) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_551| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_542| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_542| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_553| Int)) (and (or (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_551| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_553|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_962|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_553|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_551|))) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_962|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_553|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_551|))) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_551| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_553|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_542|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_542| |ULTIMATE.start_subseq_#t~post7#1.base|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_551|))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_#memory_int_811| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_196| Int) (|v_ULTIMATE.start_main_~length1~0#1_157| Int)) (and (<= (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| |v_ULTIMATE.start_main_~length2~0#1_196|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_965|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_157|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| |v_ULTIMATE.start_main_~length2~0#1_196|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_157|)) (= |#memory_int| (store (store |v_#memory_int_811| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_811| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_157|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_965| (store (select (store |v_#memory_int_811| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_811| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_157|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_965|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_962| |v_ULTIMATE.start_main_~length2~0#1_196|) 0))))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:23:57,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:57,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:57,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 109 [2024-11-14 03:23:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314089008] [2024-11-14 03:23:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:57,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-14 03:23:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-14 03:23:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1941, Invalid=12575, Unknown=4, NotChecked=0, Total=14520 [2024-11-14 03:23:57,290 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 110 states, 109 states have (on average 4.256880733944954) internal successors, (464), 110 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:59,219 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2024-11-14 03:23:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 03:23:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.256880733944954) internal successors, (464), 110 states have internal predecessors, (464), 0 states have call successors, (0), 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 170 [2024-11-14 03:23:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:59,220 INFO L225 Difference]: With dead ends: 185 [2024-11-14 03:23:59,220 INFO L226 Difference]: Without dead ends: 183 [2024-11-14 03:23:59,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 390 SyntacticMatches, 42 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10195 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1985, Invalid=12773, Unknown=4, NotChecked=0, Total=14762 [2024-11-14 03:23:59,222 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:59,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 936 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:23:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-14 03:23:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2024-11-14 03:23:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 179 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2024-11-14 03:23:59,226 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 170 [2024-11-14 03:23:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:59,226 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2024-11-14 03:23:59,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.256880733944954) internal successors, (464), 110 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:23:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2024-11-14 03:23:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-14 03:23:59,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:59,228 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:59,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 03:23:59,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:59,429 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:23:59,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1186060876, now seen corresponding path program 36 times [2024-11-14 03:23:59,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:59,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3806592] [2024-11-14 03:23:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:59,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:02,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3806592] [2024-11-14 03:24:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3806592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:24:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996934300] [2024-11-14 03:24:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:24:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:02,055 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:24:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 03:24:04,706 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:24:04,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:24:04,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-14 03:24:04,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:05,960 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 03:24:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:06,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:24:06,456 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 03:24:06,458 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 03:24:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 103 proven. 1620 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996934300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:24:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127941309] [2024-11-14 03:24:06,660 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:24:06,661 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:24:06,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:24:06,661 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:24:06,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:24:07,421 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:24:08,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34771#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:24:08,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:24:08,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:24:08,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 74 [2024-11-14 03:24:08,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839975911] [2024-11-14 03:24:08,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:24:08,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-14 03:24:08,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:24:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-14 03:24:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2024-11-14 03:24:08,727 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 74 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 03:24:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:14,294 INFO L93 Difference]: Finished difference Result 309 states and 311 transitions. [2024-11-14 03:24:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-14 03:24:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 74 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 176 [2024-11-14 03:24:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:14,296 INFO L225 Difference]: With dead ends: 309 [2024-11-14 03:24:14,296 INFO L226 Difference]: Without dead ends: 183 [2024-11-14 03:24:14,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=402, Invalid=10728, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 03:24:14,297 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 7149 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 7170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:14,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2430 Invalid, 7170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7149 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 03:24:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-14 03:24:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2024-11-14 03:24:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 181 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 03:24:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2024-11-14 03:24:14,301 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2024-11-14 03:24:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:14,301 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2024-11-14 03:24:14,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 74 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 03:24:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2024-11-14 03:24:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-14 03:24:14,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:14,303 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:14,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 03:24:14,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-14 03:24:14,503 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:24:14,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1123093962, now seen corresponding path program 37 times [2024-11-14 03:24:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:24:14,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940387050] [2024-11-14 03:24:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:24:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 361 proven. 1403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:16,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940387050] [2024-11-14 03:24:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940387050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:24:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330099127] [2024-11-14 03:24:16,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:24:16,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:16,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:16,936 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:24:16,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 03:24:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:17,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-14 03:24:17,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 400 proven. 1364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:19,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:24:21,285 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 03:24:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 400 proven. 1364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:22,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330099127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:24:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705007620] [2024-11-14 03:24:22,493 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:24:22,493 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:24:22,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:24:22,493 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:24:22,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:24:22,990 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:24:25,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36472#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_1057| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_1054| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054| 0)) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.base_591| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_591| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_600| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_602| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_600|) (or (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_602|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_600|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_602|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_600| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_600| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_591| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_602|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_600|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|)))) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_591|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_602|))))) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) 1)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_#memory_int_873| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_163| Int) (|v_ULTIMATE.start_main_~length2~0#1_204| Int)) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_163|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_163|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= |#memory_int| (store (store |v_#memory_int_873| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_873| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_163|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1057| (store (select (store |v_#memory_int_873| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_873| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_163|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_204| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|) 0))) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_204| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_204| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1054|)))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1057|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:24:25,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:24:25,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:24:25,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 93 [2024-11-14 03:24:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406108442] [2024-11-14 03:24:25,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:24:25,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 03:24:25,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:24:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 03:24:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=9759, Unknown=3, NotChecked=0, Total=10920 [2024-11-14 03:24:25,997 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 94 states, 93 states have (on average 3.903225806451613) internal successors, (363), 94 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:24:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:29,191 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2024-11-14 03:24:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 03:24:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.903225806451613) internal successors, (363), 94 states have internal predecessors, (363), 0 states have call successors, (0), 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 178 [2024-11-14 03:24:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:29,192 INFO L225 Difference]: With dead ends: 193 [2024-11-14 03:24:29,192 INFO L226 Difference]: Without dead ends: 191 [2024-11-14 03:24:29,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 430 SyntacticMatches, 44 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8061 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1204, Invalid=9923, Unknown=3, NotChecked=0, Total=11130 [2024-11-14 03:24:29,193 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 4703 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 4705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:29,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1678 Invalid, 4705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4703 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 03:24:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-14 03:24:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-11-14 03:24:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.021505376344086) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:24:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2024-11-14 03:24:29,196 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 178 [2024-11-14 03:24:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:29,196 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2024-11-14 03:24:29,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.903225806451613) internal successors, (363), 94 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:24:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2024-11-14 03:24:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 03:24:29,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:29,198 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:29,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 03:24:29,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-14 03:24:29,398 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:24:29,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1529147271, now seen corresponding path program 38 times [2024-11-14 03:24:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:24:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395267141] [2024-11-14 03:24:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:24:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 108 proven. 1785 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:32,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:32,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395267141] [2024-11-14 03:24:32,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395267141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:24:32,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035775144] [2024-11-14 03:24:32,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:24:32,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:32,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:32,311 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:24:32,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 03:24:34,990 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 03:24:34,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:24:34,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 03:24:35,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:36,125 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 03:24:59,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:24:59,341 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 03:24:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 400 proven. 1493 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:24:59,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:25:06,349 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 03:25:06,355 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 03:25:06,360 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 03:25:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 400 proven. 1493 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:25:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035775144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:25:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075617034] [2024-11-14 03:25:07,535 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:25:07,535 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:25:07,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:25:07,535 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:25:07,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:25:08,336 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:25:10,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38086#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:25:10,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:25:10,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:25:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 122 [2024-11-14 03:25:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23215360] [2024-11-14 03:25:10,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:25:10,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-14 03:25:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-14 03:25:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1478, Invalid=15814, Unknown=0, NotChecked=0, Total=17292 [2024-11-14 03:25:10,062 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 122 states, 122 states have (on average 4.131147540983607) internal successors, (504), 122 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:25:25,942 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 03:27:24,258 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 03:27:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:53,083 INFO L93 Difference]: Finished difference Result 334 states and 336 transitions. [2024-11-14 03:27:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-14 03:27:53,084 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 4.131147540983607) internal successors, (504), 122 states have internal predecessors, (504), 0 states have call successors, (0), 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 184 [2024-11-14 03:27:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:53,084 INFO L225 Difference]: With dead ends: 334 [2024-11-14 03:27:53,084 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 03:27:53,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 447 SyntacticMatches, 22 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12261 ImplicationChecksByTransitivity, 186.0s TimeCoverageRelationStatistics Valid=3510, Invalid=30162, Unknown=0, NotChecked=0, Total=33672 [2024-11-14 03:27:53,086 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 357 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 5947 mSolverCounterSat, 89 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 6038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5947 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:53,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1714 Invalid, 6038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5947 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-11-14 03:27:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 03:27:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2024-11-14 03:27:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 195 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 03:27:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2024-11-14 03:27:53,089 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 184 [2024-11-14 03:27:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:53,089 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2024-11-14 03:27:53,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 4.131147540983607) internal successors, (504), 122 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:27:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2024-11-14 03:27:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-14 03:27:53,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:53,090 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:27:53,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:53,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-14 03:27:53,290 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:27:53,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1080940826, now seen corresponding path program 39 times [2024-11-14 03:27:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339739743] [2024-11-14 03:27:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 113 proven. 1958 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:27:56,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339739743] [2024-11-14 03:27:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339739743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149717050] [2024-11-14 03:27:56,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:27:56,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:56,163 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:56,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 03:27:57,344 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:27:57,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:27:57,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-14 03:27:57,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:58,617 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 03:27:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 113 proven. 1958 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:27:58,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:59,216 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 03:27:59,218 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 03:27:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 113 proven. 1958 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:27:59,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149717050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:59,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266950446] [2024-11-14 03:27:59,431 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:27:59,431 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:27:59,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:27:59,431 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:27:59,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:27:59,828 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:02,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39956#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_1152| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_1155| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152| 1))) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) 1) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_212| Int) (|v_ULTIMATE.start_main_~length1~0#1_169| Int) (|v_#memory_int_938| (Array Int (Array Int Int)))) (and (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_212| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_169|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_169|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_212| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|)) (= |#memory_int| (store (store |v_#memory_int_938| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_938| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_169|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1155| (store (select (store |v_#memory_int_938| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_938| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_169|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_212| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|) 0))))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_652| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_643| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_643| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_654| Int)) (and (or (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_643|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_652| |ULTIMATE.start_subseq_~ps~0#1.offset|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_643| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_654|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_652|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|)))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_654|)) (and (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_652| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_654|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_652|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_654|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_652|))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1155|) 1) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1152|))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:28:02,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:02,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:02,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 80 [2024-11-14 03:28:02,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947530286] [2024-11-14 03:28:02,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:02,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-14 03:28:02,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:02,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-14 03:28:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=8065, Unknown=1, NotChecked=0, Total=8372 [2024-11-14 03:28:02,388 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 80 states, 80 states have (on average 3.15) internal successors, (252), 80 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 03:28:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:08,764 INFO L93 Difference]: Finished difference Result 337 states and 339 transitions. [2024-11-14 03:28:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-14 03:28:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.15) internal successors, (252), 80 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 192 [2024-11-14 03:28:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:08,766 INFO L225 Difference]: With dead ends: 337 [2024-11-14 03:28:08,766 INFO L226 Difference]: Without dead ends: 199 [2024-11-14 03:28:08,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=498, Invalid=12841, Unknown=1, NotChecked=0, Total=13340 [2024-11-14 03:28:08,767 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 2842 mSDsCounter, 0 mSdLazyCounter, 8540 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 8563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 8540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:08,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2892 Invalid, 8563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 8540 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-14 03:28:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-14 03:28:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2024-11-14 03:28:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 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 03:28:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-11-14 03:28:08,770 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 192 [2024-11-14 03:28:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:08,770 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-11-14 03:28:08,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.15) internal successors, (252), 80 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 03:28:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-11-14 03:28:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-14 03:28:08,771 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:08,771 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:28:08,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 03:28:08,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-14 03:28:08,971 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:28:08,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash -635032880, now seen corresponding path program 40 times [2024-11-14 03:28:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442035122] [2024-11-14 03:28:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 441 proven. 1675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:11,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442035122] [2024-11-14 03:28:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442035122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122834915] [2024-11-14 03:28:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:28:11,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:11,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:11,871 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:11,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 03:28:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:12,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-14 03:28:12,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 484 proven. 1632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:14,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:28:16,344 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 03:28:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 484 proven. 1632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122834915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:28:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959058355] [2024-11-14 03:28:17,532 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:28:17,532 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:28:17,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:28:17,532 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:28:17,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:28:18,284 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:19,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41811#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:28:19,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:19,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:19,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 101 [2024-11-14 03:28:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540335808] [2024-11-14 03:28:19,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:19,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-14 03:28:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-14 03:28:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1359, Invalid=11073, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 03:28:19,544 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 102 states, 101 states have (on average 3.910891089108911) internal successors, (395), 102 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:28:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:23,440 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2024-11-14 03:28:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 03:28:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 3.910891089108911) internal successors, (395), 102 states have internal predecessors, (395), 0 states have call successors, (0), 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 194 [2024-11-14 03:28:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:23,441 INFO L225 Difference]: With dead ends: 209 [2024-11-14 03:28:23,442 INFO L226 Difference]: Without dead ends: 207 [2024-11-14 03:28:23,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 495 SyntacticMatches, 24 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7002 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1409, Invalid=11247, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 03:28:23,446 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 9 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 5414 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 5416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:23,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1857 Invalid, 5416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5414 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 03:28:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-14 03:28:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2024-11-14 03:28:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 203 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:28:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2024-11-14 03:28:23,449 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2024-11-14 03:28:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:23,450 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2024-11-14 03:28:23,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 3.910891089108911) internal successors, (395), 102 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:28:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2024-11-14 03:28:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-14 03:28:23,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:23,451 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:28:23,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 03:28:23,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:23,652 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:28:23,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2077758061, now seen corresponding path program 41 times [2024-11-14 03:28:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:23,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964387924] [2024-11-14 03:28:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:23,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2258 backedges. 118 proven. 2139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:26,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964387924] [2024-11-14 03:28:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964387924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250340716] [2024-11-14 03:28:26,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:28:26,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:26,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:26,471 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:26,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 03:28:29,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-14 03:28:29,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:28:29,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-14 03:28:30,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:31,484 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 03:28:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2258 backedges. 118 proven. 2139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:31,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:28:32,142 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 03:28:32,145 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 16 treesize of output 12 [2024-11-14 03:28:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2258 backedges. 118 proven. 2139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:32,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250340716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:28:32,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035238835] [2024-11-14 03:28:32,422 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:28:32,422 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:28:32,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:28:32,422 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:28:32,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:28:32,823 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:35,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43513#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_1255| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_1258| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255| 0)) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_220| Int) (|v_#memory_int_1005| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_175| Int)) (and (<= (+ |v_ULTIMATE.start_main_~length2~0#1_220| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_175|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= |#memory_int| (store (store |v_#memory_int_1005| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1005| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_175|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1258| (store (select (store |v_#memory_int_1005| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1005| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_175|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_220| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|) 0))) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_220| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_175|)))) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_709| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_698| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_698| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_707| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.offset| (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_707| 1)) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_709|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_707|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_709|)) (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_698| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_709|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_698|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_709|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_707|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|)))) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_707| |ULTIMATE.start_subseq_~ps~0#1.offset|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_707|))) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1258|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1255|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:28:35,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:35,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:35,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2024-11-14 03:28:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42528551] [2024-11-14 03:28:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:35,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 03:28:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 03:28:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=8613, Unknown=3, NotChecked=0, Total=8930 [2024-11-14 03:28:35,335 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:28:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:42,568 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2024-11-14 03:28:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 03:28:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 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 200 [2024-11-14 03:28:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:42,569 INFO L225 Difference]: With dead ends: 351 [2024-11-14 03:28:42,569 INFO L226 Difference]: Without dead ends: 207 [2024-11-14 03:28:42,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=514, Invalid=13763, Unknown=3, NotChecked=0, Total=14280 [2024-11-14 03:28:42,570 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 9010 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 9034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 9010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:42,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2965 Invalid, 9034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 9010 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 03:28:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-14 03:28:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2024-11-14 03:28:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 205 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 03:28:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2024-11-14 03:28:42,574 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 200 [2024-11-14 03:28:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:42,574 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2024-11-14 03:28:42,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:28:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2024-11-14 03:28:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-14 03:28:42,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:42,575 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:28:42,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-14 03:28:42,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:42,776 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:28:42,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 513173373, now seen corresponding path program 42 times [2024-11-14 03:28:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598340859] [2024-11-14 03:28:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 484 proven. 1820 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:45,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598340859] [2024-11-14 03:28:45,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598340859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22877095] [2024-11-14 03:28:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:28:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:45,709 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 03:28:48,059 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:28:48,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:28:48,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-14 03:28:48,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 529 proven. 1775 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:50,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:28:53,092 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 03:28:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 529 proven. 1775 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:28:55,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22877095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:28:55,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442435207] [2024-11-14 03:28:55,532 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:28:55,532 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:28:55,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:28:55,532 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:28:55,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:28:55,906 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:59,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45469#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.offset_1307| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.base_1310| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307| 1))) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= 1 (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_#memory_int_1040| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_224| Int) (|v_ULTIMATE.start_main_~length1~0#1_178| Int)) (and (<= (+ |v_ULTIMATE.start_main_~length2~0#1_224| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_178|)) (= |#memory_int| (store (store |v_#memory_int_1040| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1040| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_178|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1310| (store (select (store |v_#memory_int_1040| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1040| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_178|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_224| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|) 0))) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_224| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_178|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))))) (and (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.base_736| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_725| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_725| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_734| Int)) (and (or (and (= |v_ULTIMATE.start_subseq_#t~post7#1.base_725| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_725|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_736|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_734|))) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_736|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_734| |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_736|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_734|)) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_736|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_734| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_734|))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (= 1 (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307|) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1307| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1310|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:28:59,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:59,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:59,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 129 [2024-11-14 03:28:59,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534639507] [2024-11-14 03:28:59,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:59,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-14 03:28:59,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-14 03:28:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2584, Invalid=17718, Unknown=4, NotChecked=0, Total=20306 [2024-11-14 03:28:59,038 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand has 131 states, 130 states have (on average 3.576923076923077) internal successors, (465), 130 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:04,223 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2024-11-14 03:29:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 03:29:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 3.576923076923077) internal successors, (465), 130 states have internal predecessors, (465), 0 states have call successors, (0), 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 202 [2024-11-14 03:29:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:04,225 INFO L225 Difference]: With dead ends: 217 [2024-11-14 03:29:04,226 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 03:29:04,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8745 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2664, Invalid=17924, Unknown=4, NotChecked=0, Total=20592 [2024-11-14 03:29:04,227 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 6402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:04,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2240 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6402 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 03:29:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 03:29:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2024-11-14 03:29:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.019047619047619) internal successors, (214), 211 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2024-11-14 03:29:04,232 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 202 [2024-11-14 03:29:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:04,233 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2024-11-14 03:29:04,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 3.576923076923077) internal successors, (465), 130 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2024-11-14 03:29:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-14 03:29:04,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:04,235 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:04,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 03:29:04,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:04,435 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:29:04,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1779512448, now seen corresponding path program 43 times [2024-11-14 03:29:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:04,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081359779] [2024-11-14 03:29:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:04,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 123 proven. 2328 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:08,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081359779] [2024-11-14 03:29:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081359779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136334480] [2024-11-14 03:29:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:29:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:08,210 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:08,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 03:29:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:08,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-14 03:29:08,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:10,634 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 03:29:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 123 proven. 2328 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:11,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:29:11,441 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 03:29:11,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:29:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 123 proven. 2328 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136334480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:29:11,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276399519] [2024-11-14 03:29:11,735 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:29:11,735 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:29:11,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:29:11,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:29:11,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:29:12,451 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:29:14,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47240#(<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|)' at error location [2024-11-14 03:29:14,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:29:14,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:29:14,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 86 [2024-11-14 03:29:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057007739] [2024-11-14 03:29:14,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:29:14,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 03:29:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 03:29:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=8843, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 03:29:14,116 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:23,272 INFO L93 Difference]: Finished difference Result 365 states and 367 transitions. [2024-11-14 03:29:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-14 03:29:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 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 208 [2024-11-14 03:29:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:23,273 INFO L225 Difference]: With dead ends: 365 [2024-11-14 03:29:23,273 INFO L226 Difference]: Without dead ends: 215 [2024-11-14 03:29:23,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=462, Invalid=14300, Unknown=0, NotChecked=0, Total=14762 [2024-11-14 03:29:23,274 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 3605 mSDsCounter, 0 mSdLazyCounter, 10762 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3659 SdHoareTripleChecker+Invalid, 10787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 10762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:23,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3659 Invalid, 10787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 10762 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-14 03:29:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-14 03:29:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2024-11-14 03:29:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 213 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 03:29:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2024-11-14 03:29:23,277 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 208 [2024-11-14 03:29:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:23,278 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2024-11-14 03:29:23,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2024-11-14 03:29:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-11-14 03:29:23,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:23,279 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:23,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 03:29:23,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 03:29:23,484 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:29:23,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1786502038, now seen corresponding path program 44 times [2024-11-14 03:29:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321061538] [2024-11-14 03:29:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 529 proven. 1971 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:27,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321061538] [2024-11-14 03:29:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321061538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341853919] [2024-11-14 03:29:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:29:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:27,548 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:27,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 03:29:31,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 03:29:31,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:29:31,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 03:29:31,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 576 proven. 1924 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:35,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:29:39,316 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 03:29:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 576 proven. 1924 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341853919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:29:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091311059] [2024-11-14 03:29:40,747 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:29:40,747 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:29:40,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:29:40,748 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:29:40,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:29:41,122 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:29:44,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49270#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_1418| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_1415| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415| 0)) (or (and (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.offset_782| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_793| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_791| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_782| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_793|) (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_782|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_793|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_791|))) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_782| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_791| |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_793|) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_791| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_793|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_791|)))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_791|))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|))) (and (exists ((|v_ULTIMATE.start_main_~length2~0#1_232| Int) (|v_ULTIMATE.start_main_~length1~0#1_184| Int) (|v_#memory_int_1110| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_int_1110| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1110| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_184|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1418| (store (select (store |v_#memory_int_1110| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1110| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_184|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_232| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|) 0)) |#memory_int|) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_184|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_232| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_184|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_232| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1415|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|)))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1418|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:29:44,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:29:44,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:29:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 134 [2024-11-14 03:29:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448365973] [2024-11-14 03:29:44,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:29:44,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-11-14 03:29:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-11-14 03:29:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2913, Invalid=18255, Unknown=2, NotChecked=0, Total=21170 [2024-11-14 03:29:44,941 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 135 states, 134 states have (on average 4.2835820895522385) internal successors, (574), 135 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:47,566 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2024-11-14 03:29:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 03:29:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 4.2835820895522385) internal successors, (574), 135 states have internal predecessors, (574), 0 states have call successors, (0), 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 210 [2024-11-14 03:29:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:47,567 INFO L225 Difference]: With dead ends: 225 [2024-11-14 03:29:47,567 INFO L226 Difference]: Without dead ends: 223 [2024-11-14 03:29:47,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 485 SyntacticMatches, 52 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2967, Invalid=18493, Unknown=2, NotChecked=0, Total=21462 [2024-11-14 03:29:47,568 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 13 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 4008 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 4010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:47,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1486 Invalid, 4010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4008 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 03:29:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-14 03:29:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2024-11-14 03:29:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.018348623853211) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2024-11-14 03:29:47,572 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 210 [2024-11-14 03:29:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:47,573 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2024-11-14 03:29:47,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 4.2835820895522385) internal successors, (574), 135 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:29:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2024-11-14 03:29:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-14 03:29:47,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:47,574 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:47,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-14 03:29:47,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:47,775 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:29:47,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1206307757, now seen corresponding path program 45 times [2024-11-14 03:29:47,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:47,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618367413] [2024-11-14 03:29:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 128 proven. 2525 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:51,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618367413] [2024-11-14 03:29:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618367413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743841094] [2024-11-14 03:29:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:29:51,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:51,391 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:51,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 03:29:54,774 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:29:54,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:29:54,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-11-14 03:29:54,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:56,336 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 03:29:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 128 proven. 2525 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:56,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:29:56,898 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 03:29:56,900 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 03:29:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 128 proven. 2525 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:29:57,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743841094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:29:57,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895967625] [2024-11-14 03:29:57,158 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:29:57,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:29:57,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:29:57,159 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:29:57,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:29:57,552 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:30:00,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51107#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_1473| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_1470| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470| 1)) (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470| 0)) (or (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) 1) (exists ((|v_ULTIMATE.start_main_~length1~0#1_187| Int) (|v_#memory_int_1146| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_236| Int)) (and (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_187|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_236| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_187|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_236| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|)) (= |#memory_int| (store (store |v_#memory_int_1146| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1146| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_187|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1473| (store (select (store |v_#memory_int_1146| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1146| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_187|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_236| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|) 0))))) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|))) (and (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (exists ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_820| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_811| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_822| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.offset_811| Int)) (and (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_820|) (or (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_811|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_822|) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_811| |ULTIMATE.start_subseq_#t~post7#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_822|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_820|))) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_820| |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_822|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1473|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1470|)) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_822|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_820|)) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_820| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|))))))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:30:00,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:30:00,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:30:00,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 89 [2024-11-14 03:30:00,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644878231] [2024-11-14 03:30:00,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:30:00,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-14 03:30:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-14 03:30:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=9762, Unknown=2, NotChecked=0, Total=10100 [2024-11-14 03:30:00,202 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 89 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:30:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:07,757 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2024-11-14 03:30:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-14 03:30:07,758 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 89 states have internal predecessors, (282), 0 states have call successors, (0), 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 216 [2024-11-14 03:30:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:07,758 INFO L225 Difference]: With dead ends: 379 [2024-11-14 03:30:07,759 INFO L226 Difference]: Without dead ends: 223 [2024-11-14 03:30:07,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=552, Invalid=15702, Unknown=2, NotChecked=0, Total=16256 [2024-11-14 03:30:07,759 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 3572 mSDsCounter, 0 mSdLazyCounter, 10688 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3628 SdHoareTripleChecker+Invalid, 10714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 10688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:07,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3628 Invalid, 10714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 10688 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-14 03:30:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-14 03:30:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2024-11-14 03:30:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 220 states have (on average 1.018181818181818) internal successors, (224), 221 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 03:30:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2024-11-14 03:30:07,762 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2024-11-14 03:30:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:07,763 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2024-11-14 03:30:07,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 89 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:30:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2024-11-14 03:30:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-14 03:30:07,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:07,764 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:07,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:07,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-14 03:30:07,966 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:30:07,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1267216791, now seen corresponding path program 46 times [2024-11-14 03:30:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:07,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709280315] [2024-11-14 03:30:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 576 proven. 2128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:30:12,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709280315] [2024-11-14 03:30:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709280315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711886017] [2024-11-14 03:30:12,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:30:12,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:12,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:12,615 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:12,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 03:30:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:13,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-14 03:30:13,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 625 proven. 2079 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:30:15,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:30:18,036 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 03:30:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 625 proven. 2079 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:30:19,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711886017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:30:19,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153397028] [2024-11-14 03:30:19,674 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 03:30:19,674 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:30:19,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:30:19,674 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:30:19,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:30:20,107 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:30:23,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53190#(and (exists ((|v_ULTIMATE.start_subseq_~pt~0#1.base_1529| Int) (|v_ULTIMATE.start_subseq_~pt~0#1.offset_1526| Int)) (and (or (< |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526| 0) (< (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) (+ |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526| 1))) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526| (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (<= 1 |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|) (exists ((|v_ULTIMATE.start_subseq_#t~post7#1.offset_840| Int) (|v_ULTIMATE.start_subseq_#t~post7#1.base_840| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_849| Int) (|v_ULTIMATE.start_subseq_~ps~0#1.base_851| Int)) (and (or (and (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_851|) (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_851|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_849|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|))) (= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_849| 1) |ULTIMATE.start_subseq_~ps~0#1.offset|)) (and (= |ULTIMATE.start_subseq_#t~post7#1.offset| |v_ULTIMATE.start_subseq_#t~post7#1.offset_840|) (= |ULTIMATE.start_subseq_~ps~0#1.base| |v_ULTIMATE.start_subseq_~ps~0#1.base_851|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_subseq_~ps~0#1.base_851|) |v_ULTIMATE.start_subseq_~ps~0#1.offset_849|) (select (select |#memory_int| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) (+ (- 1) |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|)))) (= |v_ULTIMATE.start_subseq_#t~post7#1.base_840| |ULTIMATE.start_subseq_#t~post7#1.base|) (= |v_ULTIMATE.start_subseq_~ps~0#1.offset_849| |ULTIMATE.start_subseq_~ps~0#1.offset|))) (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_849|))) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) 1)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_subseq_~ps~0#1.base|) |ULTIMATE.start_subseq_~ps~0#1.offset|) 0)) (exists ((|v_ULTIMATE.start_main_~length1~0#1_190| Int) (|v_#memory_int_1182| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_240| Int)) (and (<= (+ |v_ULTIMATE.start_main_~length2~0#1_240| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|) (select |#length| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_240| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|)) (<= 1 (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_190|)) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_190|) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (store (store |v_#memory_int_1182| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1182| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_190|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1529| (store (select (store |v_#memory_int_1182| |ULTIMATE.start_subseq_~ps~0#1.base| (store (select |v_#memory_int_1182| |ULTIMATE.start_subseq_~ps~0#1.base|) (+ (- 1) |ULTIMATE.start_subseq_~ps~0#1.offset| |v_ULTIMATE.start_main_~length1~0#1_190|) 0)) |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_240| |v_ULTIMATE.start_subseq_~pt~0#1.offset_1526|) 0)) |#memory_int|))) (= (select |#valid| |ULTIMATE.start_subseq_~ps~0#1.base|) 1) (<= (+ |ULTIMATE.start_subseq_~ps~0#1.offset| 1) (select |#length| |ULTIMATE.start_subseq_~ps~0#1.base|)) (= (select |#valid| |v_ULTIMATE.start_subseq_~pt~0#1.base_1529|) 1))))) (<= 0 |ULTIMATE.start_subseq_~ps~0#1.offset|))' at error location [2024-11-14 03:30:23,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:30:23,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:30:23,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 113 [2024-11-14 03:30:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643459600] [2024-11-14 03:30:23,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:30:23,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-14 03:30:23,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-14 03:30:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1675, Invalid=13822, Unknown=3, NotChecked=0, Total=15500 [2024-11-14 03:30:23,732 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 114 states, 113 states have (on average 3.920353982300885) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:30:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:28,683 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2024-11-14 03:30:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 03:30:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 3.920353982300885) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 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 218 [2024-11-14 03:30:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:28,684 INFO L225 Difference]: With dead ends: 233 [2024-11-14 03:30:28,684 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 03:30:28,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 530 SyntacticMatches, 54 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11715 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1731, Invalid=14016, Unknown=3, NotChecked=0, Total=15750 [2024-11-14 03:30:28,685 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 7008 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 7010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:28,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2479 Invalid, 7010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7008 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-14 03:30:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 03:30:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2024-11-14 03:30:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 227 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:30:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2024-11-14 03:30:28,690 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 218 [2024-11-14 03:30:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:28,690 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2024-11-14 03:30:28,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 3.920353982300885) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:30:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2024-11-14 03:30:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-14 03:30:28,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:28,692 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:28,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 03:30:28,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:28,892 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-14 03:30:28,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1751483162, now seen corresponding path program 47 times [2024-11-14 03:30:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:28,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645044381] [2024-11-14 03:30:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 133 proven. 2730 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:30:32,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645044381] [2024-11-14 03:30:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645044381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621303560] [2024-11-14 03:30:32,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:30:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:32,851 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:32,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53b6d051-3949-4da6-80d7-11834cd3603c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process