./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --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_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/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_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/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_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:28:34,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:28:34,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-13 23:28:34,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:28:34,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:28:34,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:28:34,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:28:34,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:28:34,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:28:34,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:28:34,851 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:28:34,852 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:28:34,853 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:28:34,853 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:28:34,853 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:28:34,853 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:28:34,853 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:28:34,854 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:28:34,854 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:28:34,855 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:28:34,855 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:28:34,855 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:28:34,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 23:28:34,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 23:28:34,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:28:34,856 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 23:28:34,857 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 23:28:34,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:28:34,858 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 23:28:34,858 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:28:34,858 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 23:28:34,858 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:28:34,859 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:28:34,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:28:34,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:28:34,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:28:34,860 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:28:34,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:28:34,861 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_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/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 -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2024-11-13 23:28:35,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:28:35,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:28:35,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:28:35,287 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:28:35,288 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:28:35,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c Unable to find full path for "g++" [2024-11-13 23:28:37,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:28:37,808 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:28:37,808 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2024-11-13 23:28:37,815 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/data/7b74d81ea/7038253db53b441e8edee96171d92c60/FLAG80369c163 [2024-11-13 23:28:38,069 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/data/7b74d81ea/7038253db53b441e8edee96171d92c60 [2024-11-13 23:28:38,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:28:38,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:28:38,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:28:38,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:28:38,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:28:38,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d440f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38, skipping insertion in model container [2024-11-13 23:28:38,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,098 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:28:38,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:28:38,311 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:28:38,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:28:38,352 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:28:38,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38 WrapperNode [2024-11-13 23:28:38,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:28:38,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:28:38,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:28:38,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:28:38,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,398 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-13 23:28:38,399 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:28:38,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:28:38,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:28:38,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:28:38,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,429 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,434 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:28:38,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:28:38,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:28:38,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:28:38,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (1/1) ... [2024-11-13 23:28:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:28:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:38,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:28:38,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:28:38,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:28:38,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:28:38,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:28:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:28:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:28:38,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:28:38,619 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:28:38,623 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:28:38,846 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-13 23:28:38,846 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:28:38,908 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:28:38,908 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 23:28:38,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:28:38 BoogieIcfgContainer [2024-11-13 23:28:38,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:28:38,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:28:38,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:28:38,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:28:38,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:28:38" (1/3) ... [2024-11-13 23:28:38,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf9fbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:28:38, skipping insertion in model container [2024-11-13 23:28:38,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:28:38" (2/3) ... [2024-11-13 23:28:38,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf9fbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:28:38, skipping insertion in model container [2024-11-13 23:28:38,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:28:38" (3/3) ... [2024-11-13 23:28:38,920 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2024-11-13 23:28:38,938 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:28:38,940 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysWithLenghtAtDeclaration_-write.c that has 1 procedures, 19 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-13 23:28:38,988 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:28:39,001 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;@18d176e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:28:39,002 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-13 23:28:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:28:39,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:39,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:28:39,013 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:39,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2929705, now seen corresponding path program 1 times [2024-11-13 23:28:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617884198] [2024-11-13 23:28:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:39,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617884198] [2024-11-13 23:28:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617884198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:39,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:28:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123100951] [2024-11-13 23:28:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:39,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:28:39,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:28:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:28:39,313 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) 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) [2024-11-13 23:28:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:39,396 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-11-13 23:28:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:28:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2024-11-13 23:28:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:39,410 INFO L225 Difference]: With dead ends: 23 [2024-11-13 23:28:39,411 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 23:28:39,414 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 [2024-11-13 23:28:39,420 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:39,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 23:28:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-13 23:28:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 2.0) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-13 23:28:39,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 4 [2024-11-13 23:28:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:39,463 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-13 23:28:39,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2024-11-13 23:28:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-13 23:28:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:28:39,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:39,466 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:28:39,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:28:39,467 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:39,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2931392, now seen corresponding path program 1 times [2024-11-13 23:28:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:39,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112693213] [2024-11-13 23:28:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:39,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:39,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112693213] [2024-11-13 23:28:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112693213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:39,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:28:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078246937] [2024-11-13 23:28:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:39,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:28:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:28:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:28:39,721 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.0) 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) [2024-11-13 23:28:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:39,863 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-11-13 23:28:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:28:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) 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 [2024-11-13 23:28:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:39,864 INFO L225 Difference]: With dead ends: 22 [2024-11-13 23:28:39,864 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 23:28:39,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:28:39,866 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:39,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 23:28:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-13 23:28:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-13 23:28:39,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2024-11-13 23:28:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:39,876 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-13 23:28:39,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) 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) [2024-11-13 23:28:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-13 23:28:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:28:39,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:39,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:28:39,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:28:39,877 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:39,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2993050, now seen corresponding path program 1 times [2024-11-13 23:28:39,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:39,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549474427] [2024-11-13 23:28:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:39,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:39,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549474427] [2024-11-13 23:28:39,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549474427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:39,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:39,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:28:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937260550] [2024-11-13 23:28:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:39,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:28:39,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:28:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:28:39,995 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2024-11-13 23:28:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:40,063 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-13 23:28:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:28:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2024-11-13 23:28:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:40,066 INFO L225 Difference]: With dead ends: 35 [2024-11-13 23:28:40,066 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 23:28:40,066 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 [2024-11-13 23:28:40,067 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:40,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 23:28:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2024-11-13 23:28:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-13 23:28:40,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2024-11-13 23:28:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:40,073 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-13 23:28:40,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2024-11-13 23:28:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-13 23:28:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-13 23:28:40,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:40,073 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 23:28:40,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:28:40,074 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:40,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:40,074 INFO L85 PathProgramCache]: Analyzing trace with hash 90820908, now seen corresponding path program 1 times [2024-11-13 23:28:40,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:40,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313022356] [2024-11-13 23:28:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:40,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313022356] [2024-11-13 23:28:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313022356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:40,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:40,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:28:40,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676223018] [2024-11-13 23:28:40,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:40,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:28:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:28:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:28:40,203 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2024-11-13 23:28:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:40,261 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-13 23:28:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:28:40,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2024-11-13 23:28:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:40,262 INFO L225 Difference]: With dead ends: 21 [2024-11-13 23:28:40,262 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 23:28:40,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:28:40,263 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:40,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:28:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 23:28:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-13 23:28:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-13 23:28:40,267 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2024-11-13 23:28:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:40,267 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-13 23:28:40,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2024-11-13 23:28:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-13 23:28:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-13 23:28:40,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:40,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 23:28:40,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:28:40,268 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:40,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash 90820909, now seen corresponding path program 1 times [2024-11-13 23:28:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:40,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259238006] [2024-11-13 23:28:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:40,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:40,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259238006] [2024-11-13 23:28:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259238006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:40,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:40,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:28:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722736899] [2024-11-13 23:28:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:40,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:28:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:28:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:28:40,463 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2024-11-13 23:28:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:40,555 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-13 23:28:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:28:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2024-11-13 23:28:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:40,557 INFO L225 Difference]: With dead ends: 22 [2024-11-13 23:28:40,557 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 23:28:40,557 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 [2024-11-13 23:28:40,558 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:40,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 23:28:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-13 23:28:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-13 23:28:40,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-11-13 23:28:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:40,566 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-13 23:28:40,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2024-11-13 23:28:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-13 23:28:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:28:40,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:40,566 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 23:28:40,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 23:28:40,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:40,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1379593373, now seen corresponding path program 1 times [2024-11-13 23:28:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:40,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044539076] [2024-11-13 23:28:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:40,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044539076] [2024-11-13 23:28:40,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044539076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355598356] [2024-11-13 23:28:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:40,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:40,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:40,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:28:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:40,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:28:40,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:40,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355598356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049598041] [2024-11-13 23:28:40,932 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:28:40,933 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:40,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:40,942 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:40,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:41,781 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:43,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2049598041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:43,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:43,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2024-11-13 23:28:43,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663405282] [2024-11-13 23:28:43,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:43,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:28:43,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:28:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-13 23:28:43,010 INFO L87 Difference]: Start difference. First operand 22 states and 25 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) [2024-11-13 23:28:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:43,128 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-13 23:28:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:28:43,129 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 7 [2024-11-13 23:28:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:43,129 INFO L225 Difference]: With dead ends: 29 [2024-11-13 23:28:43,129 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 23:28:43,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-13 23:28:43,130 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:43,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 23:28:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-13 23:28:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-13 23:28:43,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2024-11-13 23:28:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:43,137 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-13 23:28:43,137 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) [2024-11-13 23:28:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-13 23:28:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 23:28:43,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:43,138 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:28:43,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:28:43,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 23:28:43,343 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:43,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash 975462518, now seen corresponding path program 1 times [2024-11-13 23:28:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:43,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090564080] [2024-11-13 23:28:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:28:43,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:43,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090564080] [2024-11-13 23:28:43,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090564080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:28:43,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:28:43,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:28:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92269312] [2024-11-13 23:28:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:28:43,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:28:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:28:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:28:43,408 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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) [2024-11-13 23:28:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:43,439 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-13 23:28:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:28:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 [2024-11-13 23:28:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:43,440 INFO L225 Difference]: With dead ends: 25 [2024-11-13 23:28:43,440 INFO L226 Difference]: Without dead ends: 25 [2024-11-13 23:28:43,441 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 [2024-11-13 23:28:43,441 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:43,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:28:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-13 23:28:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-13 23:28:43,445 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) [2024-11-13 23:28:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-13 23:28:43,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2024-11-13 23:28:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:43,446 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-13 23:28:43,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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) [2024-11-13 23:28:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-13 23:28:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 23:28:43,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:43,446 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:28:43,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 23:28:43,447 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:43,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash 975462519, now seen corresponding path program 1 times [2024-11-13 23:28:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:43,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957957498] [2024-11-13 23:28:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:43,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:28:43,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:43,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957957498] [2024-11-13 23:28:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957957498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:43,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957325837] [2024-11-13 23:28:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:43,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:43,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:43,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:28:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:43,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 23:28:43,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:43,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957325837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379783308] [2024-11-13 23:28:43,814 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-13 23:28:43,814 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:43,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:43,815 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:43,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:45,756 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:45,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#true' at error location [2024-11-13 23:28:45,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:45,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-13 23:28:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602908697] [2024-11-13 23:28:45,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:45,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:28:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:28:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:28:45,873 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:46,153 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-13 23:28:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:28:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 23:28:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:46,155 INFO L225 Difference]: With dead ends: 35 [2024-11-13 23:28:46,155 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 23:28:46,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:28:46,158 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:46,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 6 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 23:28:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2024-11-13 23:28:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) 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) [2024-11-13 23:28:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-13 23:28:46,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2024-11-13 23:28:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:46,164 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-13 23:28:46,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-13 23:28:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 23:28:46,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:46,165 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:28:46,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:28:46,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:46,366 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:46,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash -840522810, now seen corresponding path program 1 times [2024-11-13 23:28:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542013344] [2024-11-13 23:28:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:46,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542013344] [2024-11-13 23:28:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542013344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776350092] [2024-11-13 23:28:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:46,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:46,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:46,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:28:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:46,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:28:46,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:46,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:28:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776350092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794836314] [2024-11-13 23:28:46,793 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:28:46,793 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:46,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:46,794 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:46,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:48,492 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:48,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '672#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.offset_24| Int) (|v_#valid_41| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_29| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) |v_ULTIMATE.start_main_~#b~0#1.offset_24|) 1)) (= (select |v_#valid_41| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (= (store (store |v_#valid_41| |v_ULTIMATE.start_main_~#b~0#1.base_29| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0) |#valid|) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_24|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_ULTIMATE.start_main_~i~1#1_52| Int)) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_52| 4294967296))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-13 23:28:48,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:48,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:48,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-11-13 23:28:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809719861] [2024-11-13 23:28:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:48,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:28:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:28:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:28:48,715 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2024-11-13 23:28:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:48,929 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-13 23:28:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:28:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 23:28:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:48,931 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:28:48,932 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:28:48,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:28:48,933 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:48,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:28:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:28:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-13 23:28:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2024-11-13 23:28:48,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 15 [2024-11-13 23:28:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:48,940 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2024-11-13 23:28:48,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2024-11-13 23:28:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2024-11-13 23:28:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 23:28:48,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:48,940 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2024-11-13 23:28:48,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:28:49,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:49,141 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:49,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2145328483, now seen corresponding path program 1 times [2024-11-13 23:28:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851435058] [2024-11-13 23:28:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:28:49,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851435058] [2024-11-13 23:28:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851435058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952063563] [2024-11-13 23:28:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:49,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:49,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:49,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:28:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:49,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:28:49,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:49,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:28:49,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952063563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:49,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219684700] [2024-11-13 23:28:49,427 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:28:49,428 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:49,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:49,429 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:49,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:51,090 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:51,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '899#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_101| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_101| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_101|))))' at error location [2024-11-13 23:28:51,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:51,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2024-11-13 23:28:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835646169] [2024-11-13 23:28:51,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:51,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:28:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:28:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:28:51,196 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2024-11-13 23:28:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:51,540 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-11-13 23:28:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:28:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-13 23:28:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:51,541 INFO L225 Difference]: With dead ends: 87 [2024-11-13 23:28:51,542 INFO L226 Difference]: Without dead ends: 87 [2024-11-13 23:28:51,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:28:51,543 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:51,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 9 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:28:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-13 23:28:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-11-13 23:28:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.4657534246575343) internal successors, (107), 77 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) [2024-11-13 23:28:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2024-11-13 23:28:51,557 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 16 [2024-11-13 23:28:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:51,557 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2024-11-13 23:28:51,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2024-11-13 23:28:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2024-11-13 23:28:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 23:28:51,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:51,558 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1] [2024-11-13 23:28:51,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:28:51,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:51,759 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:51,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2080673479, now seen corresponding path program 1 times [2024-11-13 23:28:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:51,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801023595] [2024-11-13 23:28:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:28:51,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:51,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801023595] [2024-11-13 23:28:51,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801023595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:51,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942784766] [2024-11-13 23:28:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:51,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:51,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:52,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:52,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:28:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:52,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 23:28:52,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:52,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:28:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:28:52,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:28:52,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942784766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:52,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767565251] [2024-11-13 23:28:52,413 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:28:52,413 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:52,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:52,413 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:52,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:53,723 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:53,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1194#(exists ((|v_ULTIMATE.start_foo_~b#1.base_26| Int) (|v_ULTIMATE.start_foo_~i~0#1_127| Int) (|v_ULTIMATE.start_foo_~b#1.offset_25| Int)) (and (or (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_127|) (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_127|) (<= 1 |ULTIMATE.start_foo_~size#1|))) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_127|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_26|) (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_127| 1)))))' at error location [2024-11-13 23:28:53,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:53,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:53,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 23:28:53,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031642742] [2024-11-13 23:28:53,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:53,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:28:53,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:28:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:28:53,857 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:54,040 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2024-11-13 23:28:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:28:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-13 23:28:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:54,041 INFO L225 Difference]: With dead ends: 89 [2024-11-13 23:28:54,041 INFO L226 Difference]: Without dead ends: 89 [2024-11-13 23:28:54,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:28:54,042 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:54,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-13 23:28:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2024-11-13 23:28:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.368421052631579) internal successors, (104), 80 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) [2024-11-13 23:28:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-11-13 23:28:54,048 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 17 [2024-11-13 23:28:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:54,048 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-11-13 23:28:54,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-11-13 23:28:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:28:54,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:54,048 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1] [2024-11-13 23:28:54,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:28:54,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 23:28:54,252 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:54,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1927594049, now seen corresponding path program 1 times [2024-11-13 23:28:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776989532] [2024-11-13 23:28:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:54,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:54,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776989532] [2024-11-13 23:28:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776989532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732498615] [2024-11-13 23:28:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:54,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:28:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:54,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 23:28:54,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:54,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732498615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232135217] [2024-11-13 23:28:54,608 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:28:54,608 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:54,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:54,608 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:54,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:55,556 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:55,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1497#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-13 23:28:55,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:55,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:55,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-13 23:28:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267912399] [2024-11-13 23:28:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:55,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 23:28:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 23:28:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:28:55,607 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2024-11-13 23:28:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:55,786 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-11-13 23:28:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:28:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) Word has length 19 [2024-11-13 23:28:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:55,787 INFO L225 Difference]: With dead ends: 81 [2024-11-13 23:28:55,787 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 23:28:55,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:28:55,788 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:55,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 23:28:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-13 23:28:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 80 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2024-11-13 23:28:55,798 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 19 [2024-11-13 23:28:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:55,798 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2024-11-13 23:28:55,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2024-11-13 23:28:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2024-11-13 23:28:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 23:28:55,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:55,799 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1] [2024-11-13 23:28:55,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:28:56,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 23:28:56,000 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:56,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1191378357, now seen corresponding path program 2 times [2024-11-13 23:28:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687600783] [2024-11-13 23:28:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 23:28:56,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687600783] [2024-11-13 23:28:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687600783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658721440] [2024-11-13 23:28:56,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:28:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:56,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:56,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:28:56,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:28:56,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:28:56,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 23:28:56,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:56,424 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 [2024-11-13 23:28:56,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:28:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 23:28:56,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 23:28:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658721440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265402460] [2024-11-13 23:28:56,855 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:28:56,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:56,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:56,859 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:56,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:28:58,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:28:58,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1811#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-13 23:28:58,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:28:58,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:28:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 8 [2024-11-13 23:28:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853527131] [2024-11-13 23:28:58,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:28:58,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:28:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:28:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:28:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:28:58,070 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2024-11-13 23:28:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:28:58,156 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2024-11-13 23:28:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:28:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) Word has length 22 [2024-11-13 23:28:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:28:58,157 INFO L225 Difference]: With dead ends: 103 [2024-11-13 23:28:58,157 INFO L226 Difference]: Without dead ends: 103 [2024-11-13 23:28:58,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:28:58,158 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:28:58,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:28:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-13 23:28:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2024-11-13 23:28:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 96 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:28:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2024-11-13 23:28:58,165 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 22 [2024-11-13 23:28:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:28:58,166 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2024-11-13 23:28:58,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2024-11-13 23:28:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2024-11-13 23:28:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 23:28:58,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:28:58,167 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1] [2024-11-13 23:28:58,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 23:28:58,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 23:28:58,371 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:28:58,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:28:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1307290327, now seen corresponding path program 2 times [2024-11-13 23:28:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:28:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964639186] [2024-11-13 23:28:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:28:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:28:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:28:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:28:58,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:28:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964639186] [2024-11-13 23:28:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964639186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:28:58,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744142869] [2024-11-13 23:28:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:28:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:28:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:28:58,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:28:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:28:58,684 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:28:58,684 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:28:58,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:28:58,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:28:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:28:58,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:28:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:28:59,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744142869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:28:59,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204353866] [2024-11-13 23:28:59,223 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:28:59,223 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:28:59,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:28:59,224 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:28:59,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:00,969 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:01,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2180#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_209| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_209| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_209|))))' at error location [2024-11-13 23:29:01,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:01,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:01,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-13 23:29:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588222613] [2024-11-13 23:29:01,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:01,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 23:29:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 23:29:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:29:01,111 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:01,766 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2024-11-13 23:29:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 23:29:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 23:29:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:01,768 INFO L225 Difference]: With dead ends: 94 [2024-11-13 23:29:01,768 INFO L226 Difference]: Without dead ends: 94 [2024-11-13 23:29:01,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 23:29:01,769 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:01,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 21 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:29:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-13 23:29:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-13 23:29:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 91 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) [2024-11-13 23:29:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2024-11-13 23:29:01,775 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 25 [2024-11-13 23:29:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:01,776 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2024-11-13 23:29:01,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2024-11-13 23:29:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 23:29:01,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:01,777 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 2, 2, 1, 1] [2024-11-13 23:29:01,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:29:01,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 23:29:01,981 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:01,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1768779681, now seen corresponding path program 2 times [2024-11-13 23:29:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:01,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133988953] [2024-11-13 23:29:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 23:29:02,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133988953] [2024-11-13 23:29:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133988953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715401227] [2024-11-13 23:29:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:29:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:02,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:02,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:29:02,392 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:29:02,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:02,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 23:29:02,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:02,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-13 23:29:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:29:02,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-13 23:29:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-13 23:29:02,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-13 23:29:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715401227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123686163] [2024-11-13 23:29:03,046 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:03,046 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:03,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:03,046 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:03,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:04,382 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:04,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2635#(exists ((|v_ULTIMATE.start_foo_~i~0#1_241| Int) (|v_ULTIMATE.start_foo_~b#1.base_47| Int) (|v_ULTIMATE.start_foo_~b#1.offset_46| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_46| |v_ULTIMATE.start_foo_~i~0#1_241|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_47|) (+ |v_ULTIMATE.start_foo_~b#1.offset_46| |v_ULTIMATE.start_foo_~i~0#1_241| 1))) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_241|)) (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_241|) (<= 1 |ULTIMATE.start_foo_~size#1|)))))' at error location [2024-11-13 23:29:04,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:04,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-13 23:29:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573861454] [2024-11-13 23:29:04,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:04,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 23:29:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 23:29:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:29:04,530 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:05,295 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2024-11-13 23:29:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 23:29:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-13 23:29:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:05,296 INFO L225 Difference]: With dead ends: 89 [2024-11-13 23:29:05,296 INFO L226 Difference]: Without dead ends: 89 [2024-11-13 23:29:05,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 23:29:05,297 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:05,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 12 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:29:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-13 23:29:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2024-11-13 23:29:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 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) [2024-11-13 23:29:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2024-11-13 23:29:05,305 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 38 [2024-11-13 23:29:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:05,305 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2024-11-13 23:29:05,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2024-11-13 23:29:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 23:29:05,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:05,307 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-13 23:29:05,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 23:29:05,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 23:29:05,511 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:05,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 535302378, now seen corresponding path program 2 times [2024-11-13 23:29:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:05,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032505178] [2024-11-13 23:29:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 160 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:29:05,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:05,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032505178] [2024-11-13 23:29:05,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032505178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:05,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816592476] [2024-11-13 23:29:05,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:29:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:05,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:05,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:29:06,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 23:29:06,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:06,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:29:06,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:06,710 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (not (= |v_ULTIMATE.start_main_~#b~0#1.base_32| |v_ULTIMATE.start_main_~#mask~0#1.base_22|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_22|) 0) (<= 1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_22| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_32|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_22| 0)))) is different from true [2024-11-13 23:29:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-13 23:29:06,712 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:29:06,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816592476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:29:06,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:29:06,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2024-11-13 23:29:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192309208] [2024-11-13 23:29:06,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:29:06,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:29:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:29:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2024-11-13 23:29:06,713 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:06,749 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2024-11-13 23:29:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:29:06,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-13 23:29:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:06,751 INFO L225 Difference]: With dead ends: 84 [2024-11-13 23:29:06,751 INFO L226 Difference]: Without dead ends: 83 [2024-11-13 23:29:06,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2024-11-13 23:29:06,751 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:06,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2024-11-13 23:29:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-13 23:29:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-13 23:29:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.139240506329114) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2024-11-13 23:29:06,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 51 [2024-11-13 23:29:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:06,756 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2024-11-13 23:29:06,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2024-11-13 23:29:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 23:29:06,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:06,758 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-13 23:29:06,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:29:06,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 23:29:06,958 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:06,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -585504562, now seen corresponding path program 1 times [2024-11-13 23:29:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:06,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580111437] [2024-11-13 23:29:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 147 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 23:29:07,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580111437] [2024-11-13 23:29:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580111437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866765890] [2024-11-13 23:29:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:07,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:29:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:07,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:29:07,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 23:29:07,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 23:29:07,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866765890] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:07,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15007745] [2024-11-13 23:29:07,717 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:29:07,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:07,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:07,720 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:07,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:08,768 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:08,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3187#true' at error location [2024-11-13 23:29:08,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:08,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:08,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-13 23:29:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068078898] [2024-11-13 23:29:08,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:08,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 23:29:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 23:29:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:29:08,914 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:09,321 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-11-13 23:29:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 23:29:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 23:29:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:09,322 INFO L225 Difference]: With dead ends: 89 [2024-11-13 23:29:09,323 INFO L226 Difference]: Without dead ends: 89 [2024-11-13 23:29:09,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-11-13 23:29:09,324 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:09,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 8 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:29:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-13 23:29:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2024-11-13 23:29:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 85 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2024-11-13 23:29:09,329 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 52 [2024-11-13 23:29:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:09,329 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2024-11-13 23:29:09,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2024-11-13 23:29:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 23:29:09,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:09,331 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-13 23:29:09,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 23:29:09,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:29:09,531 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:09,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -390406426, now seen corresponding path program 2 times [2024-11-13 23:29:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:09,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103900322] [2024-11-13 23:29:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 78 proven. 191 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 23:29:10,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:10,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103900322] [2024-11-13 23:29:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103900322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874039623] [2024-11-13 23:29:10,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:29:10,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:10,177 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:10,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:29:10,292 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:29:10,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:10,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 23:29:10,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:10,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:29:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:29:10,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-13 23:29:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-13 23:29:10,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-13 23:29:10,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874039623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:10,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156947559] [2024-11-13 23:29:10,995 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:29:10,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:10,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:10,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:10,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:11,922 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:12,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3709#true' at error location [2024-11-13 23:29:12,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:12,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:12,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 3] total 19 [2024-11-13 23:29:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336911294] [2024-11-13 23:29:12,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:12,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 23:29:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 23:29:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-11-13 23:29:12,094 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:13,004 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2024-11-13 23:29:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 23:29:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-13 23:29:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:13,005 INFO L225 Difference]: With dead ends: 92 [2024-11-13 23:29:13,005 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 23:29:13,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=542, Invalid=2320, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 23:29:13,007 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 162 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:13,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 13 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:29:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 23:29:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-13 23:29:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2024-11-13 23:29:13,014 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 58 [2024-11-13 23:29:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:13,015 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2024-11-13 23:29:13,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2024-11-13 23:29:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-13 23:29:13,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:13,020 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 1, 1] [2024-11-13 23:29:13,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 23:29:13,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:29:13,221 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:13,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -738046807, now seen corresponding path program 3 times [2024-11-13 23:29:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697047516] [2024-11-13 23:29:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 216 proven. 26 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-13 23:29:13,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697047516] [2024-11-13 23:29:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697047516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468220150] [2024-11-13 23:29:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:29:13,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:13,487 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:13,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:29:13,651 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:29:13,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:13,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:29:13,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 519 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-13 23:29:13,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 216 proven. 26 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-13 23:29:13,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468220150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:13,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025149051] [2024-11-13 23:29:13,965 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:13,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:13,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:13,966 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:13,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:14,922 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:15,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4748#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_341| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_341|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_341| 4294967296)))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:29:15,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:15,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:15,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 17 [2024-11-13 23:29:15,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530552384] [2024-11-13 23:29:15,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:15,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 23:29:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 23:29:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:29:15,040 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:16,481 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2024-11-13 23:29:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 23:29:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-13 23:29:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:16,482 INFO L225 Difference]: With dead ends: 163 [2024-11-13 23:29:16,482 INFO L226 Difference]: Without dead ends: 163 [2024-11-13 23:29:16,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 23:29:16,483 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:16,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 19 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:29:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-13 23:29:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2024-11-13 23:29:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2024-11-13 23:29:16,487 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 70 [2024-11-13 23:29:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:16,487 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2024-11-13 23:29:16,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2024-11-13 23:29:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 23:29:16,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:16,489 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 5, 5, 4, 1, 1] [2024-11-13 23:29:16,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:29:16,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:16,693 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:16,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1214739787, now seen corresponding path program 3 times [2024-11-13 23:29:16,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:16,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188080440] [2024-11-13 23:29:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:16,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 256 proven. 319 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-13 23:29:17,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188080440] [2024-11-13 23:29:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188080440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427112136] [2024-11-13 23:29:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:29:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:17,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:17,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:29:17,488 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:29:17,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:17,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 23:29:17,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 281 proven. 283 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-13 23:29:17,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 281 proven. 283 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-13 23:29:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427112136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121567771] [2024-11-13 23:29:18,173 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:18,174 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:18,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:18,174 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:18,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:19,569 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:19,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5560#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-13 23:29:19,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:19,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 29 [2024-11-13 23:29:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415275278] [2024-11-13 23:29:19,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:19,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 23:29:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 23:29:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 23:29:19,665 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:20,774 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2024-11-13 23:29:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 23:29:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 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 73 [2024-11-13 23:29:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:20,776 INFO L225 Difference]: With dead ends: 111 [2024-11-13 23:29:20,776 INFO L226 Difference]: Without dead ends: 111 [2024-11-13 23:29:20,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 23:29:20,777 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:20,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 12 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:29:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-13 23:29:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-13 23:29:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.102803738317757) internal successors, (118), 110 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) [2024-11-13 23:29:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2024-11-13 23:29:20,781 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 73 [2024-11-13 23:29:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:20,781 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2024-11-13 23:29:20,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2024-11-13 23:29:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 23:29:20,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:20,782 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 1, 1] [2024-11-13 23:29:20,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:29:20,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:20,983 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:20,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:20,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1031253697, now seen corresponding path program 4 times [2024-11-13 23:29:20,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:20,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090884355] [2024-11-13 23:29:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 35 proven. 509 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-13 23:29:21,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090884355] [2024-11-13 23:29:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090884355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981159540] [2024-11-13 23:29:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:29:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:21,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:29:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:22,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 23:29:22,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:22,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:29:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:29:22,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-13 23:29:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-13 23:29:22,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-13 23:29:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981159540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:23,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040849008] [2024-11-13 23:29:23,238 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:23,238 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:23,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:23,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:23,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:24,148 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:24,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6314#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-13 23:29:24,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:24,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 24 [2024-11-13 23:29:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362624952] [2024-11-13 23:29:24,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:24,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 23:29:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 23:29:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-11-13 23:29:24,253 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 26 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:28,007 INFO L93 Difference]: Finished difference Result 327 states and 371 transitions. [2024-11-13 23:29:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-13 23:29:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-13 23:29:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:28,009 INFO L225 Difference]: With dead ends: 327 [2024-11-13 23:29:28,009 INFO L226 Difference]: Without dead ends: 327 [2024-11-13 23:29:28,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3127 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2289, Invalid=7023, Unknown=0, NotChecked=0, Total=9312 [2024-11-13 23:29:28,012 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 141 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:28,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 21 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:29:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-13 23:29:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 321. [2024-11-13 23:29:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 317 states have (on average 1.1703470031545742) internal successors, (371), 320 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 371 transitions. [2024-11-13 23:29:28,022 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 371 transitions. Word has length 76 [2024-11-13 23:29:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:28,022 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 371 transitions. [2024-11-13 23:29:28,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 371 transitions. [2024-11-13 23:29:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 23:29:28,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:28,024 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 5, 4, 4, 1, 1] [2024-11-13 23:29:28,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 23:29:28,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:28,224 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:28,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash -64848087, now seen corresponding path program 4 times [2024-11-13 23:29:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:28,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785519742] [2024-11-13 23:29:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 141 proven. 783 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-13 23:29:28,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785519742] [2024-11-13 23:29:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785519742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416267524] [2024-11-13 23:29:28,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:29:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:28,778 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:28,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 23:29:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:28,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:29:28,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 331 proven. 571 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-13 23:29:29,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 331 proven. 571 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-13 23:29:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416267524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:29,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091649928] [2024-11-13 23:29:29,316 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:29,316 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:29,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:29,317 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:29,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:30,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:30,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_486| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_486|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_486| 4294967296)))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:29:30,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:30,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:30,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 26 [2024-11-13 23:29:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300391302] [2024-11-13 23:29:30,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:30,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:29:30,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:29:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2024-11-13 23:29:30,412 INFO L87 Difference]: Start difference. First operand 321 states and 371 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:31,069 INFO L93 Difference]: Finished difference Result 308 states and 351 transitions. [2024-11-13 23:29:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 23:29:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-13 23:29:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:31,075 INFO L225 Difference]: With dead ends: 308 [2024-11-13 23:29:31,075 INFO L226 Difference]: Without dead ends: 308 [2024-11-13 23:29:31,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 240 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=656, Invalid=2536, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 23:29:31,083 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:31,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 26 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:29:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-13 23:29:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2024-11-13 23:29:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 304 states have (on average 1.1546052631578947) internal successors, (351), 307 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 351 transitions. [2024-11-13 23:29:31,093 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 351 transitions. Word has length 88 [2024-11-13 23:29:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:31,094 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 351 transitions. [2024-11-13 23:29:31,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 351 transitions. [2024-11-13 23:29:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-13 23:29:31,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:31,095 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2024-11-13 23:29:31,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 23:29:31,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:31,296 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:31,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 172245089, now seen corresponding path program 1 times [2024-11-13 23:29:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:31,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021745226] [2024-11-13 23:29:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2024-11-13 23:29:31,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021745226] [2024-11-13 23:29:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021745226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:31,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664611820] [2024-11-13 23:29:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:31,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:31,629 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:31,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 23:29:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:31,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 23:29:31,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-13 23:29:32,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 11 proven. 620 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-13 23:29:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664611820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260810077] [2024-11-13 23:29:32,845 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:29:32,845 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:32,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:32,845 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:32,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:33,794 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:34,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8910#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_180| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~1#1_180|) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_180| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_37| Int) (|v_#valid_61| (Array Int Int)) (|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int)) (= (store (store |v_#valid_61| |v_ULTIMATE.start_main_~#b~0#1.base_37| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0) |#valid|)) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:29:34,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:34,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:34,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 13] total 32 [2024-11-13 23:29:34,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505181339] [2024-11-13 23:29:34,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:34,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 23:29:34,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 23:29:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 23:29:34,098 INFO L87 Difference]: Start difference. First operand 308 states and 351 transitions. Second operand has 32 states, 32 states have (on average 4.21875) internal successors, (135), 32 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:35,001 INFO L93 Difference]: Finished difference Result 363 states and 404 transitions. [2024-11-13 23:29:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 23:29:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 32 states have internal predecessors, (135), 0 states have call successors, (0), 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 94 [2024-11-13 23:29:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:35,002 INFO L225 Difference]: With dead ends: 363 [2024-11-13 23:29:35,002 INFO L226 Difference]: Without dead ends: 363 [2024-11-13 23:29:35,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=1438, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 23:29:35,004 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 178 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:35,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 85 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:29:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-13 23:29:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 357. [2024-11-13 23:29:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.1444759206798867) internal successors, (404), 356 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 404 transitions. [2024-11-13 23:29:35,015 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 404 transitions. Word has length 94 [2024-11-13 23:29:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:35,015 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 404 transitions. [2024-11-13 23:29:35,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 32 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 404 transitions. [2024-11-13 23:29:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-13 23:29:35,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:35,017 INFO L215 NwaCegarLoop]: trace histogram [31, 30, 30, 6, 5, 5, 1, 1] [2024-11-13 23:29:35,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 23:29:35,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 23:29:35,221 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:35,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -293912791, now seen corresponding path program 5 times [2024-11-13 23:29:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342495867] [2024-11-13 23:29:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 147 proven. 1283 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-13 23:29:36,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342495867] [2024-11-13 23:29:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342495867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175981120] [2024-11-13 23:29:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:29:36,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:36,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:36,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:36,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 23:29:36,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-13 23:29:36,482 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:36,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-13 23:29:36,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 338 proven. 836 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-11-13 23:29:37,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1174 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-11-13 23:29:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175981120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471034616] [2024-11-13 23:29:38,440 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:38,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:38,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:38,440 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:38,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:29:39,369 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:29:39,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10358#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_608| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_608|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_608| 4294967296)))))' at error location [2024-11-13 23:29:39,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:29:39,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:29:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 56 [2024-11-13 23:29:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120368545] [2024-11-13 23:29:39,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:29:39,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 23:29:39,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:29:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 23:29:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=3312, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:29:39,610 INFO L87 Difference]: Start difference. First operand 357 states and 404 transitions. Second operand has 57 states, 57 states have (on average 2.8771929824561404) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:29:55,656 INFO L93 Difference]: Finished difference Result 906 states and 1056 transitions. [2024-11-13 23:29:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-13 23:29:55,657 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8771929824561404) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 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 109 [2024-11-13 23:29:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:29:55,660 INFO L225 Difference]: With dead ends: 906 [2024-11-13 23:29:55,660 INFO L226 Difference]: Without dead ends: 906 [2024-11-13 23:29:55,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10318 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=6763, Invalid=21967, Unknown=0, NotChecked=0, Total=28730 [2024-11-13 23:29:55,670 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 451 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:29:55,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 21 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:29:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2024-11-13 23:29:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 842. [2024-11-13 23:29:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 838 states have (on average 1.1599045346062054) internal successors, (972), 841 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 972 transitions. [2024-11-13 23:29:55,695 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 972 transitions. Word has length 109 [2024-11-13 23:29:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:29:55,696 INFO L471 AbstractCegarLoop]: Abstraction has 842 states and 972 transitions. [2024-11-13 23:29:55,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8771929824561404) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:29:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 972 transitions. [2024-11-13 23:29:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-13 23:29:55,699 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:29:55,700 INFO L215 NwaCegarLoop]: trace histogram [59, 58, 58, 9, 8, 8, 1, 1] [2024-11-13 23:29:55,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 23:29:55,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 23:29:55,901 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:29:55,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:29:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash -342089711, now seen corresponding path program 6 times [2024-11-13 23:29:55,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:29:55,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041627404] [2024-11-13 23:29:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:29:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:29:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:29:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5639 backedges. 3542 proven. 1010 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2024-11-13 23:29:57,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:29:57,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041627404] [2024-11-13 23:29:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041627404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:29:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947995390] [2024-11-13 23:29:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:29:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:29:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:29:57,185 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:29:57,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 23:29:57,851 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:29:57,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:29:57,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:29:57,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:29:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5639 backedges. 203 proven. 4884 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-13 23:29:58,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:29:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5639 backedges. 203 proven. 4884 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-13 23:29:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947995390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:29:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162025709] [2024-11-13 23:29:59,228 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:29:59,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:29:59,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:29:59,229 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:29:59,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:00,198 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:00,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13584#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_704| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_704|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_704| 4294967296)))))' at error location [2024-11-13 23:30:00,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:00,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 51 [2024-11-13 23:30:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563547678] [2024-11-13 23:30:00,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:00,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 23:30:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 23:30:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2683, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:30:00,378 INFO L87 Difference]: Start difference. First operand 842 states and 972 transitions. Second operand has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:03,938 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2024-11-13 23:30:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-13 23:30:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 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 [2024-11-13 23:30:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:03,940 INFO L225 Difference]: With dead ends: 460 [2024-11-13 23:30:03,940 INFO L226 Difference]: Without dead ends: 460 [2024-11-13 23:30:03,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 561 SyntacticMatches, 9 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3073, Invalid=16387, Unknown=0, NotChecked=0, Total=19460 [2024-11-13 23:30:03,943 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 245 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:03,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 21 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 23:30:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-11-13 23:30:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2024-11-13 23:30:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 456 states have (on average 1.1271929824561404) internal successors, (514), 459 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 514 transitions. [2024-11-13 23:30:03,952 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 514 transitions. Word has length 202 [2024-11-13 23:30:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:03,953 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 514 transitions. [2024-11-13 23:30:03,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 514 transitions. [2024-11-13 23:30:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-13 23:30:03,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:03,956 INFO L215 NwaCegarLoop]: trace histogram [67, 67, 67, 11, 11, 10, 1, 1] [2024-11-13 23:30:03,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 23:30:04,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:04,157 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:04,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash 507776845, now seen corresponding path program 5 times [2024-11-13 23:30:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071892549] [2024-11-13 23:30:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 5021 proven. 336 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2024-11-13 23:30:05,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:05,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071892549] [2024-11-13 23:30:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071892549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:05,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535268186] [2024-11-13 23:30:05,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:30:05,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:05,433 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:05,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 23:30:05,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:30:05,648 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:30:05,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:30:05,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:05,662 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 [2024-11-13 23:30:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:30:05,676 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 [2024-11-13 23:30:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 10 proven. 1583 refuted. 0 times theorem prover too weak. 5942 trivial. 0 not checked. [2024-11-13 23:30:07,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 1593 refuted. 0 times theorem prover too weak. 5942 trivial. 0 not checked. [2024-11-13 23:30:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535268186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796986023] [2024-11-13 23:30:09,666 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:30:09,666 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:09,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:09,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:09,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:10,630 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:10,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16112#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-13 23:30:10,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:10,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:10,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5] total 31 [2024-11-13 23:30:10,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299694032] [2024-11-13 23:30:10,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:10,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 23:30:10,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 23:30:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 23:30:10,808 INFO L87 Difference]: Start difference. First operand 460 states and 514 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:13,455 INFO L93 Difference]: Finished difference Result 459 states and 503 transitions. [2024-11-13 23:30:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 23:30:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2024-11-13 23:30:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:13,458 INFO L225 Difference]: With dead ends: 459 [2024-11-13 23:30:13,458 INFO L226 Difference]: Without dead ends: 459 [2024-11-13 23:30:13,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=942, Invalid=3614, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 23:30:13,459 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 103 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:13,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 17 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:30:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-13 23:30:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-13 23:30:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 456 states have (on average 1.1030701754385965) internal successors, (503), 458 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 503 transitions. [2024-11-13 23:30:13,471 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 503 transitions. Word has length 235 [2024-11-13 23:30:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:13,472 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 503 transitions. [2024-11-13 23:30:13,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 503 transitions. [2024-11-13 23:30:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2024-11-13 23:30:13,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:13,476 INFO L215 NwaCegarLoop]: trace histogram [78, 77, 77, 11, 10, 10, 1, 1] [2024-11-13 23:30:13,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 23:30:13,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:13,680 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:13,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 471401885, now seen corresponding path program 7 times [2024-11-13 23:30:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84864774] [2024-11-13 23:30:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 6434 proven. 420 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2024-11-13 23:30:15,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84864774] [2024-11-13 23:30:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84864774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15582216] [2024-11-13 23:30:15,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:30:15,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:15,358 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:15,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 23:30:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:15,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:30:15,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 7121 proven. 1429 refuted. 0 times theorem prover too weak. 1307 trivial. 0 not checked. [2024-11-13 23:30:16,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 7121 proven. 1429 refuted. 0 times theorem prover too weak. 1307 trivial. 0 not checked. [2024-11-13 23:30:17,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15582216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:17,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434770779] [2024-11-13 23:30:17,131 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:30:17,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:17,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:17,132 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:17,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:18,010 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:18,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18737#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_921| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_921|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_921| 4294967296)))))' at error location [2024-11-13 23:30:18,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:18,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 51 [2024-11-13 23:30:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062451251] [2024-11-13 23:30:18,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:18,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 23:30:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 23:30:18,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:30:18,182 INFO L87 Difference]: Start difference. First operand 459 states and 503 transitions. Second operand has 51 states, 51 states have (on average 3.5098039215686274) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:21,387 INFO L93 Difference]: Finished difference Result 459 states and 497 transitions. [2024-11-13 23:30:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-13 23:30:21,387 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.5098039215686274) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 265 [2024-11-13 23:30:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:21,389 INFO L225 Difference]: With dead ends: 459 [2024-11-13 23:30:21,390 INFO L226 Difference]: Without dead ends: 459 [2024-11-13 23:30:21,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 754 SyntacticMatches, 9 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2637, Invalid=11643, Unknown=0, NotChecked=0, Total=14280 [2024-11-13 23:30:21,392 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:21,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 7 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 23:30:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-13 23:30:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-13 23:30:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 456 states have (on average 1.0899122807017543) internal successors, (497), 458 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 497 transitions. [2024-11-13 23:30:21,404 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 497 transitions. Word has length 265 [2024-11-13 23:30:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:21,404 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 497 transitions. [2024-11-13 23:30:21,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.5098039215686274) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 497 transitions. [2024-11-13 23:30:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-11-13 23:30:21,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:21,407 INFO L215 NwaCegarLoop]: trace histogram [79, 78, 78, 11, 10, 10, 1, 1] [2024-11-13 23:30:21,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-13 23:30:21,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:21,607 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:21,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1153412521, now seen corresponding path program 8 times [2024-11-13 23:30:21,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:21,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133280772] [2024-11-13 23:30:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 6035 proven. 596 refuted. 0 times theorem prover too weak. 3469 trivial. 0 not checked. [2024-11-13 23:30:23,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133280772] [2024-11-13 23:30:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133280772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893219443] [2024-11-13 23:30:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:30:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:23,135 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 23:30:23,499 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-13 23:30:23,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:30:23,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:30:23,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 2286 proven. 155 refuted. 0 times theorem prover too weak. 7659 trivial. 0 not checked. [2024-11-13 23:30:23,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 2286 proven. 155 refuted. 0 times theorem prover too weak. 7659 trivial. 0 not checked. [2024-11-13 23:30:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893219443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718279092] [2024-11-13 23:30:24,454 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:30:24,454 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:24,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:24,455 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:24,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:25,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:25,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21441#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_961| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_961| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_961|))))' at error location [2024-11-13 23:30:25,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:25,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:25,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12, 12] total 51 [2024-11-13 23:30:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067721355] [2024-11-13 23:30:25,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:25,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 23:30:25,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 23:30:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 23:30:25,470 INFO L87 Difference]: Start difference. First operand 459 states and 497 transitions. Second operand has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:31,485 INFO L93 Difference]: Finished difference Result 556 states and 605 transitions. [2024-11-13 23:30:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 23:30:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 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 268 [2024-11-13 23:30:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:31,489 INFO L225 Difference]: With dead ends: 556 [2024-11-13 23:30:31,489 INFO L226 Difference]: Without dead ends: 556 [2024-11-13 23:30:31,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1547, Invalid=6643, Unknown=0, NotChecked=0, Total=8190 [2024-11-13 23:30:31,490 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:31,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:30:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-11-13 23:30:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 504. [2024-11-13 23:30:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 501 states have (on average 1.0718562874251496) internal successors, (537), 503 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 537 transitions. [2024-11-13 23:30:31,501 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 537 transitions. Word has length 268 [2024-11-13 23:30:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:31,502 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 537 transitions. [2024-11-13 23:30:31,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 537 transitions. [2024-11-13 23:30:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2024-11-13 23:30:31,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:31,504 INFO L215 NwaCegarLoop]: trace histogram [84, 84, 84, 12, 12, 12, 8, 7, 7, 1, 1, 1] [2024-11-13 23:30:31,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 23:30:31,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 23:30:31,705 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:31,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -272943982, now seen corresponding path program 3 times [2024-11-13 23:30:31,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:31,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290111379] [2024-11-13 23:30:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11753 backedges. 7017 proven. 3493 refuted. 0 times theorem prover too weak. 1243 trivial. 0 not checked. [2024-11-13 23:30:33,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:33,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290111379] [2024-11-13 23:30:33,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290111379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722415564] [2024-11-13 23:30:33,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:30:33,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:33,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 23:30:34,298 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:30:34,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:30:34,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 23:30:34,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11753 backedges. 8277 proven. 2560 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2024-11-13 23:30:35,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11753 backedges. 8277 proven. 2560 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2024-11-13 23:30:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722415564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007092952] [2024-11-13 23:30:35,603 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:30:35,603 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:35,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:35,603 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:35,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:36,526 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:36,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22576#true' at error location [2024-11-13 23:30:36,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:36,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:36,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2024-11-13 23:30:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350572346] [2024-11-13 23:30:36,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:36,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 23:30:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 23:30:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 23:30:36,758 INFO L87 Difference]: Start difference. First operand 504 states and 537 transitions. Second operand has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 41 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) [2024-11-13 23:30:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:39,860 INFO L93 Difference]: Finished difference Result 430 states and 451 transitions. [2024-11-13 23:30:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-13 23:30:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 41 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2024-11-13 23:30:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:39,863 INFO L225 Difference]: With dead ends: 430 [2024-11-13 23:30:39,863 INFO L226 Difference]: Without dead ends: 430 [2024-11-13 23:30:39,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 895 SyntacticMatches, 20 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6893 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5466, Invalid=15414, Unknown=0, NotChecked=0, Total=20880 [2024-11-13 23:30:39,866 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:39,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 9 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 23:30:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-13 23:30:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2024-11-13 23:30:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 427 states have (on average 1.0562060889929743) internal successors, (451), 429 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 451 transitions. [2024-11-13 23:30:39,874 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 451 transitions. Word has length 313 [2024-11-13 23:30:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:39,874 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 451 transitions. [2024-11-13 23:30:39,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 41 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) [2024-11-13 23:30:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 451 transitions. [2024-11-13 23:30:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2024-11-13 23:30:39,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:39,876 INFO L215 NwaCegarLoop]: trace histogram [90, 90, 90, 12, 12, 12, 8, 7, 7, 1, 1, 1] [2024-11-13 23:30:39,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 23:30:40,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 23:30:40,077 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:40,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 906697490, now seen corresponding path program 4 times [2024-11-13 23:30:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131708572] [2024-11-13 23:30:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13382 backedges. 7017 proven. 1012 refuted. 0 times theorem prover too weak. 5353 trivial. 0 not checked. [2024-11-13 23:30:42,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131708572] [2024-11-13 23:30:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131708572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500606214] [2024-11-13 23:30:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:30:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:42,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:42,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 23:30:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:42,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 1462 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:30:42,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:30:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13382 backedges. 12111 proven. 89 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2024-11-13 23:30:44,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:30:44,526 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 24 treesize of output 20 [2024-11-13 23:30:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13382 backedges. 12111 proven. 89 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2024-11-13 23:30:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500606214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:30:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762211898] [2024-11-13 23:30:46,021 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:30:46,021 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:30:46,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:30:46,021 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:30:46,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:30:47,059 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:30:47,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25550#true' at error location [2024-11-13 23:30:47,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:30:47,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:30:47,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 67 [2024-11-13 23:30:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402367895] [2024-11-13 23:30:47,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:30:47,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 23:30:47,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:30:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 23:30:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=4704, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 23:30:47,370 INFO L87 Difference]: Start difference. First operand 430 states and 451 transitions. Second operand has 69 states, 68 states have (on average 4.014705882352941) internal successors, (273), 68 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:30:54,841 INFO L93 Difference]: Finished difference Result 545 states and 574 transitions. [2024-11-13 23:30:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-13 23:30:54,841 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.014705882352941) internal successors, (273), 68 states have internal predecessors, (273), 0 states have call successors, (0), 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 331 [2024-11-13 23:30:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:30:54,843 INFO L225 Difference]: With dead ends: 545 [2024-11-13 23:30:54,844 INFO L226 Difference]: Without dead ends: 545 [2024-11-13 23:30:54,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 941 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11208 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6312, Invalid=32300, Unknown=0, NotChecked=0, Total=38612 [2024-11-13 23:30:54,847 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 696 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4529 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 4529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:30:54,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 22 Invalid, 4609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 4529 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 23:30:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-11-13 23:30:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 431. [2024-11-13 23:30:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 428 states have (on average 1.0467289719626167) internal successors, (448), 430 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 448 transitions. [2024-11-13 23:30:54,856 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 448 transitions. Word has length 331 [2024-11-13 23:30:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:30:54,857 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 448 transitions. [2024-11-13 23:30:54,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.014705882352941) internal successors, (273), 68 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:30:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 448 transitions. [2024-11-13 23:30:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2024-11-13 23:30:54,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:30:54,860 INFO L215 NwaCegarLoop]: trace histogram [102, 101, 101, 12, 11, 11, 1, 1] [2024-11-13 23:30:54,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 23:30:55,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:55,061 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:30:55,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:30:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1809832163, now seen corresponding path program 9 times [2024-11-13 23:30:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:30:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160142618] [2024-11-13 23:30:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:30:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:30:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:30:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16650 backedges. 9228 proven. 2526 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2024-11-13 23:30:58,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:30:58,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160142618] [2024-11-13 23:30:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160142618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:30:58,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169999261] [2024-11-13 23:30:58,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:30:58,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:30:58,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:30:58,346 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:30:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 23:31:00,053 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:31:00,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:00,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 23:31:00,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16650 backedges. 816 proven. 14822 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-11-13 23:31:02,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16650 backedges. 816 proven. 14822 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-11-13 23:31:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169999261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:03,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684800996] [2024-11-13 23:31:03,623 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:31:03,624 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:03,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:03,624 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:03,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:04,477 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:04,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30965#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_1360| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1360|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_1360| 4294967296)))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:31:04,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:04,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:04,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 36, 36] total 107 [2024-11-13 23:31:04,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556449833] [2024-11-13 23:31:04,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:04,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-13 23:31:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-13 23:31:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1916, Invalid=10516, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 23:31:04,878 INFO L87 Difference]: Start difference. First operand 431 states and 448 transitions. Second operand has 107 states, 107 states have (on average 3.5514018691588785) internal successors, (380), 107 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:21,533 INFO L93 Difference]: Finished difference Result 1474 states and 1612 transitions. [2024-11-13 23:31:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2024-11-13 23:31:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.5514018691588785) internal successors, (380), 107 states have internal predecessors, (380), 0 states have call successors, (0), 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 340 [2024-11-13 23:31:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:21,538 INFO L225 Difference]: With dead ends: 1474 [2024-11-13 23:31:21,538 INFO L226 Difference]: Without dead ends: 1474 [2024-11-13 23:31:21,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1346 GetRequests, 949 SyntacticMatches, 14 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59324 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=25326, Invalid=122514, Unknown=0, NotChecked=0, Total=147840 [2024-11-13 23:31:21,551 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 215 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:21,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 20 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 23:31:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2024-11-13 23:31:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 976. [2024-11-13 23:31:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 973 states have (on average 1.0729701952723536) internal successors, (1044), 975 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1044 transitions. [2024-11-13 23:31:21,618 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1044 transitions. Word has length 340 [2024-11-13 23:31:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:21,619 INFO L471 AbstractCegarLoop]: Abstraction has 976 states and 1044 transitions. [2024-11-13 23:31:21,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.5514018691588785) internal successors, (380), 107 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1044 transitions. [2024-11-13 23:31:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2024-11-13 23:31:21,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:21,621 INFO L215 NwaCegarLoop]: trace histogram [90, 90, 90, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1] [2024-11-13 23:31:21,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 23:31:21,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 23:31:21,822 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:31:21,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1856885798, now seen corresponding path program 2 times [2024-11-13 23:31:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:21,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499201425] [2024-11-13 23:31:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13515 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 13305 trivial. 0 not checked. [2024-11-13 23:31:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499201425] [2024-11-13 23:31:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499201425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498332327] [2024-11-13 23:31:22,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:22,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:22,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:22,900 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:22,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 23:31:23,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 23:31:23,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:23,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 23:31:23,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:25,586 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_24| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_41| Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_41| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_24| 0)) (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_41| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#mask~0#1.base_24| v_DerPreprocessor_4) |v_ULTIMATE.start_main_~#b~0#1.base_41|) v_DerPreprocessor_3) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_24|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_41|) 0))) is different from true [2024-11-13 23:31:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13515 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13503 trivial. 0 not checked. [2024-11-13 23:31:25,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:31:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498332327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:31:25,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:31:25,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 18 [2024-11-13 23:31:25,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908238495] [2024-11-13 23:31:25,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:31:25,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:31:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:31:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2024-11-13 23:31:25,590 INFO L87 Difference]: Start difference. First operand 976 states and 1044 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2024-11-13 23:31:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:25,622 INFO L93 Difference]: Finished difference Result 975 states and 1043 transitions. [2024-11-13 23:31:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:31:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 346 [2024-11-13 23:31:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:25,624 INFO L225 Difference]: With dead ends: 975 [2024-11-13 23:31:25,624 INFO L226 Difference]: Without dead ends: 974 [2024-11-13 23:31:25,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2024-11-13 23:31:25,624 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:25,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2024-11-13 23:31:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2024-11-13 23:31:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 974. [2024-11-13 23:31:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 972 states have (on average 1.0720164609053497) internal successors, (1042), 973 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1042 transitions. [2024-11-13 23:31:25,641 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1042 transitions. Word has length 346 [2024-11-13 23:31:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:25,642 INFO L471 AbstractCegarLoop]: Abstraction has 974 states and 1042 transitions. [2024-11-13 23:31:25,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2024-11-13 23:31:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1042 transitions. [2024-11-13 23:31:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2024-11-13 23:31:25,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:25,644 INFO L215 NwaCegarLoop]: trace histogram [90, 90, 90, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-13 23:31:25,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 23:31:25,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 23:31:25,845 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:31:25,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1856886741, now seen corresponding path program 5 times [2024-11-13 23:31:25,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:25,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002132904] [2024-11-13 23:31:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:25,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13527 backedges. 0 proven. 3479 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2024-11-13 23:31:27,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002132904] [2024-11-13 23:31:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002132904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881154601] [2024-11-13 23:31:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:27,635 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:27,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 23:31:27,947 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:31:27,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:27,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:31:27,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:27,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-13 23:31:27,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-13 23:31:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13527 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 13492 trivial. 0 not checked. [2024-11-13 23:31:29,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:31:29,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881154601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:31:29,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:31:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2024-11-13 23:31:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259640513] [2024-11-13 23:31:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:31:29,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:31:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:31:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:31:29,094 INFO L87 Difference]: Start difference. First operand 974 states and 1042 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:29,125 INFO L93 Difference]: Finished difference Result 973 states and 1041 transitions. [2024-11-13 23:31:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:31:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2024-11-13 23:31:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:29,128 INFO L225 Difference]: With dead ends: 973 [2024-11-13 23:31:29,128 INFO L226 Difference]: Without dead ends: 935 [2024-11-13 23:31:29,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:31:29,129 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:29,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:31:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2024-11-13 23:31:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 935. [2024-11-13 23:31:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.0620985010706638) internal successors, (992), 934 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 992 transitions. [2024-11-13 23:31:29,145 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 992 transitions. Word has length 346 [2024-11-13 23:31:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:29,145 INFO L471 AbstractCegarLoop]: Abstraction has 935 states and 992 transitions. [2024-11-13 23:31:29,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 992 transitions. [2024-11-13 23:31:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2024-11-13 23:31:29,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:29,151 INFO L215 NwaCegarLoop]: trace histogram [231, 230, 230, 22, 21, 21, 1, 1] [2024-11-13 23:31:29,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 23:31:29,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:29,355 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:31:29,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 428380873, now seen corresponding path program 10 times [2024-11-13 23:31:29,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:29,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185437470] [2024-11-13 23:31:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 84967 backedges. 48939 proven. 846 refuted. 0 times theorem prover too weak. 35182 trivial. 0 not checked. [2024-11-13 23:31:32,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185437470] [2024-11-13 23:31:32,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185437470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211386195] [2024-11-13 23:31:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:31:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:32,988 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:32,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 23:31:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:33,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 23:31:33,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84967 backedges. 54389 proven. 4015 refuted. 0 times theorem prover too weak. 26563 trivial. 0 not checked. [2024-11-13 23:31:34,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 84967 backedges. 54389 proven. 4015 refuted. 0 times theorem prover too weak. 26563 trivial. 0 not checked. [2024-11-13 23:31:35,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211386195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669839645] [2024-11-13 23:31:35,949 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:31:35,949 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:35,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:35,949 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:35,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:36,728 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:36,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44538#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_1645| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_1645| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1645|))))' at error location [2024-11-13 23:31:36,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:36,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:36,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 70 [2024-11-13 23:31:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191609587] [2024-11-13 23:31:36,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:36,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 23:31:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 23:31:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2024-11-13 23:31:36,923 INFO L87 Difference]: Start difference. First operand 935 states and 992 transitions. Second operand has 70 states, 70 states have (on average 3.5428571428571427) internal successors, (248), 70 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:44,381 INFO L93 Difference]: Finished difference Result 890 states and 935 transitions. [2024-11-13 23:31:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-13 23:31:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.5428571428571427) internal successors, (248), 70 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 757 [2024-11-13 23:31:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:44,384 INFO L225 Difference]: With dead ends: 890 [2024-11-13 23:31:44,384 INFO L226 Difference]: Without dead ends: 890 [2024-11-13 23:31:44,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2417 GetRequests, 2214 SyntacticMatches, 13 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6503, Invalid=30169, Unknown=0, NotChecked=0, Total=36672 [2024-11-13 23:31:44,387 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5204 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:44,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 5222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5204 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 23:31:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2024-11-13 23:31:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2024-11-13 23:31:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.0517435320584927) internal successors, (935), 889 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 935 transitions. [2024-11-13 23:31:44,404 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 935 transitions. Word has length 757 [2024-11-13 23:31:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:44,405 INFO L471 AbstractCegarLoop]: Abstraction has 890 states and 935 transitions. [2024-11-13 23:31:44,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.5428571428571427) internal successors, (248), 70 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 935 transitions. [2024-11-13 23:31:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2024-11-13 23:31:44,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:44,417 INFO L215 NwaCegarLoop]: trace histogram [239, 238, 238, 22, 21, 21, 1, 1] [2024-11-13 23:31:44,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 23:31:44,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:44,618 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:31:44,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1232971561, now seen corresponding path program 11 times [2024-11-13 23:31:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:44,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981775476] [2024-11-13 23:31:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:44,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90755 backedges. 59503 proven. 3271 refuted. 0 times theorem prover too weak. 27981 trivial. 0 not checked. [2024-11-13 23:31:48,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981775476] [2024-11-13 23:31:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981775476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526852693] [2024-11-13 23:31:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:48,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:48,650 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 23:31:49,695 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-13 23:31:49,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:49,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 23:31:49,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90755 backedges. 9027 proven. 15502 refuted. 0 times theorem prover too weak. 66226 trivial. 0 not checked. [2024-11-13 23:31:51,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 90755 backedges. 0 proven. 24529 refuted. 0 times theorem prover too weak. 66226 trivial. 0 not checked. [2024-11-13 23:31:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526852693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33706841] [2024-11-13 23:31:54,490 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:31:54,490 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:54,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:54,490 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:54,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:55,213 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:55,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51315#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_1941| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1941|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_1941| 4294967296)))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:31:55,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:55,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:55,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 21, 21] total 78 [2024-11-13 23:31:55,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509599422] [2024-11-13 23:31:55,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:55,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-13 23:31:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-13 23:31:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=5715, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 23:31:55,435 INFO L87 Difference]: Start difference. First operand 890 states and 935 transitions. Second operand has 78 states, 78 states have (on average 2.948717948717949) internal successors, (230), 78 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) [2024-11-13 23:32:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:32:07,527 INFO L93 Difference]: Finished difference Result 1007 states and 1074 transitions. [2024-11-13 23:32:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2024-11-13 23:32:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.948717948717949) internal successors, (230), 78 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) Word has length 781 [2024-11-13 23:32:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:32:07,529 INFO L225 Difference]: With dead ends: 1007 [2024-11-13 23:32:07,529 INFO L226 Difference]: Without dead ends: 1007 [2024-11-13 23:32:07,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2541 GetRequests, 2296 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18101 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=9969, Invalid=50793, Unknown=0, NotChecked=0, Total=60762 [2024-11-13 23:32:07,533 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 724 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:32:07,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 0 Invalid, 3569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 23:32:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-13 23:32:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1006. [2024-11-13 23:32:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0676616915422885) internal successors, (1073), 1005 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1073 transitions. [2024-11-13 23:32:07,546 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1073 transitions. Word has length 781 [2024-11-13 23:32:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:32:07,547 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1073 transitions. [2024-11-13 23:32:07,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.948717948717949) internal successors, (230), 78 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) [2024-11-13 23:32:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1073 transitions. [2024-11-13 23:32:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2024-11-13 23:32:07,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:32:07,555 INFO L215 NwaCegarLoop]: trace histogram [277, 276, 276, 23, 22, 22, 1, 1] [2024-11-13 23:32:07,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 23:32:07,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:07,755 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:32:07,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:32:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash -296828215, now seen corresponding path program 12 times [2024-11-13 23:32:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:32:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541953994] [2024-11-13 23:32:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:32:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:32:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121211 backedges. 71030 proven. 1119 refuted. 0 times theorem prover too weak. 49062 trivial. 0 not checked. [2024-11-13 23:32:11,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:32:11,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541953994] [2024-11-13 23:32:11,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541953994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:32:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957910752] [2024-11-13 23:32:11,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:32:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:32:11,862 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:32:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 23:32:30,462 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:32:30,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:32:30,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 3743 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 23:32:30,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:32:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 121211 backedges. 95696 proven. 8146 refuted. 0 times theorem prover too weak. 17369 trivial. 0 not checked. [2024-11-13 23:32:32,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:32:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 121211 backedges. 95696 proven. 8146 refuted. 0 times theorem prover too weak. 17369 trivial. 0 not checked. [2024-11-13 23:32:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957910752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:32:33,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278944265] [2024-11-13 23:32:33,422 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:32:33,422 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:32:33,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:32:33,422 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:32:33,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:32:34,294 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:32:34,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59115#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_2275| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_2275| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2275|))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:32:34,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:32:34,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:32:34,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 72 [2024-11-13 23:32:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692434483] [2024-11-13 23:32:34,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:32:34,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-13 23:32:34,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:32:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-13 23:32:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=4909, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 23:32:34,481 INFO L87 Difference]: Start difference. First operand 1006 states and 1073 transitions. Second operand has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:32:46,530 INFO L93 Difference]: Finished difference Result 1006 states and 1044 transitions. [2024-11-13 23:32:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2024-11-13 23:32:46,530 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 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 898 [2024-11-13 23:32:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:32:46,532 INFO L225 Difference]: With dead ends: 1006 [2024-11-13 23:32:46,532 INFO L226 Difference]: Without dead ends: 1006 [2024-11-13 23:32:46,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2935 GetRequests, 2624 SyntacticMatches, 29 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24042 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=15120, Invalid=65252, Unknown=0, NotChecked=0, Total=80372 [2024-11-13 23:32:46,535 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6525 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:32:46,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 6543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6525 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 23:32:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2024-11-13 23:32:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2024-11-13 23:32:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0388059701492538) internal successors, (1044), 1005 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1044 transitions. [2024-11-13 23:32:46,547 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1044 transitions. Word has length 898 [2024-11-13 23:32:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:32:46,547 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1044 transitions. [2024-11-13 23:32:46,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1044 transitions. [2024-11-13 23:32:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2024-11-13 23:32:46,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:32:46,556 INFO L215 NwaCegarLoop]: trace histogram [298, 297, 297, 23, 22, 22, 1, 1] [2024-11-13 23:32:46,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 23:32:46,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 23:32:46,758 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:32:46,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:32:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1186817389, now seen corresponding path program 13 times [2024-11-13 23:32:46,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:32:46,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463863568] [2024-11-13 23:32:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:32:46,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:32:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 139733 backedges. 83502 proven. 1416 refuted. 0 times theorem prover too weak. 54815 trivial. 0 not checked. [2024-11-13 23:32:51,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:32:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463863568] [2024-11-13 23:32:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463863568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:32:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408745582] [2024-11-13 23:32:51,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:32:51,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:32:51,520 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:32:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 23:32:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:52,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 3974 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 23:32:52,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:32:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 139733 backedges. 103191 proven. 8617 refuted. 0 times theorem prover too weak. 27925 trivial. 0 not checked. [2024-11-13 23:32:54,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:32:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 139733 backedges. 103191 proven. 8617 refuted. 0 times theorem prover too weak. 27925 trivial. 0 not checked. [2024-11-13 23:32:56,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408745582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:32:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610517630] [2024-11-13 23:32:56,351 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:32:56,352 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:32:56,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:32:56,352 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:32:56,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:32:57,123 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:32:57,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67396#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_2632| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_2632| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2632|))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:32:57,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:32:57,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:32:57,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36, 36] total 90 [2024-11-13 23:32:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279910787] [2024-11-13 23:32:57,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:32:57,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-13 23:32:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:32:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-13 23:32:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=7622, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 23:32:57,363 INFO L87 Difference]: Start difference. First operand 1006 states and 1044 transitions. Second operand has 90 states, 90 states have (on average 3.5555555555555554) internal successors, (320), 90 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:12,294 INFO L93 Difference]: Finished difference Result 1006 states and 1043 transitions. [2024-11-13 23:33:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2024-11-13 23:33:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.5555555555555554) internal successors, (320), 90 states have internal predecessors, (320), 0 states have call successors, (0), 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 961 [2024-11-13 23:33:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:12,296 INFO L225 Difference]: With dead ends: 1006 [2024-11-13 23:33:12,297 INFO L226 Difference]: Without dead ends: 1006 [2024-11-13 23:33:12,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3107 GetRequests, 2810 SyntacticMatches, 17 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21098 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=13816, Invalid=65426, Unknown=0, NotChecked=0, Total=79242 [2024-11-13 23:33:12,302 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9008 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 9008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:12,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 9033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 9008 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-13 23:33:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2024-11-13 23:33:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2024-11-13 23:33:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.037810945273632) internal successors, (1043), 1005 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1043 transitions. [2024-11-13 23:33:12,320 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1043 transitions. Word has length 961 [2024-11-13 23:33:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:12,321 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1043 transitions. [2024-11-13 23:33:12,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.5555555555555554) internal successors, (320), 90 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1043 transitions. [2024-11-13 23:33:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2024-11-13 23:33:12,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:12,339 INFO L215 NwaCegarLoop]: trace histogram [299, 298, 298, 23, 22, 22, 1, 1] [2024-11-13 23:33:12,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 23:33:12,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 23:33:12,540 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:33:12,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1499345273, now seen corresponding path program 14 times [2024-11-13 23:33:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541598931] [2024-11-13 23:33:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 140648 backedges. 102088 proven. 19735 refuted. 0 times theorem prover too weak. 18825 trivial. 0 not checked. [2024-11-13 23:33:19,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541598931] [2024-11-13 23:33:19,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541598931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255525697] [2024-11-13 23:33:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:33:19,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:19,028 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:19,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 23:33:20,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-13 23:33:20,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:33:20,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 23:33:20,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 140648 backedges. 19274 proven. 737 refuted. 0 times theorem prover too weak. 120637 trivial. 0 not checked. [2024-11-13 23:33:21,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 140648 backedges. 19274 proven. 737 refuted. 0 times theorem prover too weak. 120637 trivial. 0 not checked. [2024-11-13 23:33:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255525697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246933602] [2024-11-13 23:33:23,115 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:33:23,115 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:23,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:23,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:23,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:23,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:24,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75657#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_2696| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2696|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_2696| 4294967296)))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:33:24,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:24,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:24,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24, 24] total 92 [2024-11-13 23:33:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234514] [2024-11-13 23:33:24,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:24,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-13 23:33:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-13 23:33:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=8299, Unknown=0, NotChecked=0, Total=9312 [2024-11-13 23:33:24,271 INFO L87 Difference]: Start difference. First operand 1006 states and 1043 transitions. Second operand has 92 states, 92 states have (on average 3.239130434782609) internal successors, (298), 92 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:43,243 INFO L93 Difference]: Finished difference Result 1020 states and 1049 transitions. [2024-11-13 23:33:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2024-11-13 23:33:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.239130434782609) internal successors, (298), 92 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 964 [2024-11-13 23:33:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:43,246 INFO L225 Difference]: With dead ends: 1020 [2024-11-13 23:33:43,246 INFO L226 Difference]: Without dead ends: 1020 [2024-11-13 23:33:43,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3147 GetRequests, 2841 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25639 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=12492, Invalid=82064, Unknown=0, NotChecked=0, Total=94556 [2024-11-13 23:33:43,255 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 217 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15771 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 15805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 15771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:43,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1 Invalid, 15805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 15771 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-13 23:33:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-11-13 23:33:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1013. [2024-11-13 23:33:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.0276679841897234) internal successors, (1040), 1012 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1040 transitions. [2024-11-13 23:33:43,267 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1040 transitions. Word has length 964 [2024-11-13 23:33:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:43,268 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1040 transitions. [2024-11-13 23:33:43,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.239130434782609) internal successors, (298), 92 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1040 transitions. [2024-11-13 23:33:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2024-11-13 23:33:43,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:43,278 INFO L215 NwaCegarLoop]: trace histogram [312, 311, 311, 23, 22, 22, 1, 1] [2024-11-13 23:33:43,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 23:33:43,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 23:33:43,478 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:33:43,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1703250869, now seen corresponding path program 15 times [2024-11-13 23:33:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78308117] [2024-11-13 23:33:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:43,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 152816 backedges. 112773 proven. 22811 refuted. 0 times theorem prover too weak. 17232 trivial. 0 not checked. [2024-11-13 23:33:49,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78308117] [2024-11-13 23:33:49,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78308117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020265270] [2024-11-13 23:33:49,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:33:49,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:49,790 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:49,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 23:34:20,977 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:34:20,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:34:21,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 4128 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 23:34:21,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:34:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 152816 backedges. 124579 proven. 13738 refuted. 0 times theorem prover too weak. 14499 trivial. 0 not checked. [2024-11-13 23:34:22,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:34:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 152816 backedges. 124579 proven. 13738 refuted. 0 times theorem prover too weak. 14499 trivial. 0 not checked. [2024-11-13 23:34:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020265270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:34:24,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950958773] [2024-11-13 23:34:24,215 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:34:24,215 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:34:24,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:34:24,216 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:34:24,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:34:25,011 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:34:25,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84206#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_3071| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3071|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_3071| 4294967296)))))' at error location [2024-11-13 23:34:25,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:34:25,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:34:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 77 [2024-11-13 23:34:25,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712522012] [2024-11-13 23:34:25,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:34:25,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-13 23:34:25,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-13 23:34:25,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=5503, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 23:34:25,237 INFO L87 Difference]: Start difference. First operand 1013 states and 1040 transitions. Second operand has 77 states, 77 states have (on average 3.844155844155844) internal successors, (296), 77 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:43,331 INFO L93 Difference]: Finished difference Result 1013 states and 1036 transitions. [2024-11-13 23:34:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-11-13 23:34:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.844155844155844) internal successors, (296), 77 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1003 [2024-11-13 23:34:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:43,333 INFO L225 Difference]: With dead ends: 1013 [2024-11-13 23:34:43,333 INFO L226 Difference]: Without dead ends: 1013 [2024-11-13 23:34:43,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3306 GetRequests, 2935 SyntacticMatches, 39 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33926 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=21285, Invalid=89937, Unknown=0, NotChecked=0, Total=111222 [2024-11-13 23:34:43,337 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7884 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:43,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 7905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7884 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-13 23:34:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2024-11-13 23:34:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2024-11-13 23:34:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.023715415019763) internal successors, (1036), 1012 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1036 transitions. [2024-11-13 23:34:43,347 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1036 transitions. Word has length 1003 [2024-11-13 23:34:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:43,347 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1036 transitions. [2024-11-13 23:34:43,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.844155844155844) internal successors, (296), 77 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1036 transitions. [2024-11-13 23:34:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2024-11-13 23:34:43,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:43,357 INFO L215 NwaCegarLoop]: trace histogram [314, 313, 313, 23, 22, 22, 1, 1] [2024-11-13 23:34:43,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 23:34:43,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 23:34:43,561 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:34:43,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1859431011, now seen corresponding path program 16 times [2024-11-13 23:34:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:43,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60907625] [2024-11-13 23:34:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 154733 backedges. 77024 proven. 2136 refuted. 0 times theorem prover too weak. 75573 trivial. 0 not checked. [2024-11-13 23:34:49,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:34:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60907625] [2024-11-13 23:34:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60907625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:34:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292276836] [2024-11-13 23:34:49,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:34:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:34:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:34:49,091 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:34:49,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 23:34:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:34:50,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 4150 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-13 23:34:50,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:34:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 154733 backedges. 128210 proven. 15811 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2024-11-13 23:34:52,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:34:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 154733 backedges. 128210 proven. 15811 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2024-11-13 23:34:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292276836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:34:54,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074662510] [2024-11-13 23:34:54,726 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:34:54,727 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:34:54,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:34:54,727 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:34:54,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:34:55,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:34:55,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92878#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_3448| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3448|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_3448| 4294967296)))))' at error location [2024-11-13 23:34:55,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:34:55,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:34:55,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 44, 44] total 89 [2024-11-13 23:34:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042251908] [2024-11-13 23:34:55,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:34:55,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-13 23:34:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-13 23:34:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1375, Invalid=7367, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 23:34:55,816 INFO L87 Difference]: Start difference. First operand 1013 states and 1036 transitions. Second operand has 89 states, 89 states have (on average 3.7191011235955056) internal successors, (331), 89 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:15,752 INFO L93 Difference]: Finished difference Result 1013 states and 1033 transitions. [2024-11-13 23:35:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2024-11-13 23:35:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.7191011235955056) internal successors, (331), 89 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1009 [2024-11-13 23:35:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:15,755 INFO L225 Difference]: With dead ends: 1013 [2024-11-13 23:35:15,755 INFO L226 Difference]: Without dead ends: 1013 [2024-11-13 23:35:15,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3346 GetRequests, 2939 SyntacticMatches, 41 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41981 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=22563, Invalid=112493, Unknown=0, NotChecked=0, Total=135056 [2024-11-13 23:35:15,762 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11351 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 11351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:15,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 11372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 11351 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-13 23:35:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2024-11-13 23:35:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2024-11-13 23:35:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.0207509881422925) internal successors, (1033), 1012 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1033 transitions. [2024-11-13 23:35:15,771 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1033 transitions. Word has length 1009 [2024-11-13 23:35:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:15,772 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1033 transitions. [2024-11-13 23:35:15,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.7191011235955056) internal successors, (331), 89 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1033 transitions. [2024-11-13 23:35:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2024-11-13 23:35:15,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:15,780 INFO L215 NwaCegarLoop]: trace histogram [315, 314, 314, 23, 22, 22, 1, 1] [2024-11-13 23:35:15,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 23:35:15,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 23:35:15,981 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:35:15,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -195940951, now seen corresponding path program 17 times [2024-11-13 23:35:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:15,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316078096] [2024-11-13 23:35:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 155696 backedges. 71896 proven. 13374 refuted. 0 times theorem prover too weak. 70426 trivial. 0 not checked. [2024-11-13 23:35:29,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316078096] [2024-11-13 23:35:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316078096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992487202] [2024-11-13 23:35:29,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:35:29,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:29,851 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:29,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 23:35:34,403 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-13 23:35:34,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:35:34,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 23:35:34,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 155696 backedges. 37502 proven. 31176 refuted. 0 times theorem prover too weak. 87018 trivial. 0 not checked. [2024-11-13 23:35:38,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 155696 backedges. 0 proven. 68678 refuted. 0 times theorem prover too weak. 87018 trivial. 0 not checked. [2024-11-13 23:35:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992487202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627407664] [2024-11-13 23:35:43,852 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:35:43,852 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:43,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:43,853 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:43,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:44,615 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:45,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101676#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_3829| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_3829| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3829|))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:35:45,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:45,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:45,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 30, 30] total 153 [2024-11-13 23:35:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034400186] [2024-11-13 23:35:45,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:45,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2024-11-13 23:35:45,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2024-11-13 23:35:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=22101, Unknown=0, NotChecked=0, Total=24806 [2024-11-13 23:35:45,025 INFO L87 Difference]: Start difference. First operand 1013 states and 1033 transitions. Second operand has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:36:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:36:05,485 INFO L93 Difference]: Finished difference Result 1464 states and 1518 transitions. [2024-11-13 23:36:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2024-11-13 23:36:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 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 1012 [2024-11-13 23:36:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:36:05,487 INFO L225 Difference]: With dead ends: 1464 [2024-11-13 23:36:05,488 INFO L226 Difference]: Without dead ends: 1464 [2024-11-13 23:36:05,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3379 GetRequests, 2971 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63380 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=22540, Invalid=145150, Unknown=0, NotChecked=0, Total=167690 [2024-11-13 23:36:05,494 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 911 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4279 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 4279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:36:05,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 0 Invalid, 4361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 4279 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 23:36:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2024-11-13 23:36:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1364. [2024-11-13 23:36:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 1.033015407190022) internal successors, (1408), 1363 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:36:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1408 transitions. [2024-11-13 23:36:05,507 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1408 transitions. Word has length 1012 [2024-11-13 23:36:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:36:05,508 INFO L471 AbstractCegarLoop]: Abstraction has 1364 states and 1408 transitions. [2024-11-13 23:36:05,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.934640522875817) internal successors, (449), 153 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:36:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1408 transitions. [2024-11-13 23:36:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2024-11-13 23:36:05,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:36:05,522 INFO L215 NwaCegarLoop]: trace histogram [418, 417, 417, 27, 26, 26, 1, 1] [2024-11-13 23:36:05,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 23:36:05,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:36:05,723 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:36:05,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:36:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1722864589, now seen corresponding path program 18 times [2024-11-13 23:36:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:36:05,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780947040] [2024-11-13 23:36:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:36:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:36:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:36:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 272911 backedges. 164592 proven. 8992 refuted. 0 times theorem prover too weak. 99327 trivial. 0 not checked. [2024-11-13 23:36:14,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:36:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780947040] [2024-11-13 23:36:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780947040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:36:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991642174] [2024-11-13 23:36:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:36:14,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:36:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:36:14,978 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:36:14,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 23:37:25,977 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:37:25,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:26,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 5414 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-13 23:37:26,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 272911 backedges. 71918 proven. 186699 refuted. 0 times theorem prover too weak. 14294 trivial. 0 not checked. [2024-11-13 23:37:29,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 272911 backedges. 71918 proven. 186699 refuted. 0 times theorem prover too weak. 14294 trivial. 0 not checked. [2024-11-13 23:37:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991642174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263728279] [2024-11-13 23:37:34,130 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:37:34,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:34,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:34,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:34,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:35,123 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:35,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '113149#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_4322| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_4322| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4322|))))' at error location [2024-11-13 23:37:35,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:35,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:35,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 57, 57] total 144 [2024-11-13 23:37:35,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226408475] [2024-11-13 23:37:35,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:35,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-11-13 23:37:35,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-11-13 23:37:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2803, Invalid=19249, Unknown=0, NotChecked=0, Total=22052 [2024-11-13 23:37:35,580 INFO L87 Difference]: Start difference. First operand 1364 states and 1408 transitions. Second operand has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:10,375 INFO L93 Difference]: Finished difference Result 1779 states and 1816 transitions. [2024-11-13 23:38:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2024-11-13 23:38:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 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 1333 [2024-11-13 23:38:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:10,378 INFO L225 Difference]: With dead ends: 1779 [2024-11-13 23:38:10,378 INFO L226 Difference]: Without dead ends: 1779 [2024-11-13 23:38:10,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4578 GetRequests, 3882 SyntacticMatches, 21 SemanticMatches, 675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176554 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=47566, Invalid=410086, Unknown=0, NotChecked=0, Total=457652 [2024-11-13 23:38:10,389 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 717 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8708 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 8708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:10,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 0 Invalid, 8778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 8708 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-13 23:38:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2024-11-13 23:38:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1778. [2024-11-13 23:38:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.0213843556555993) internal successors, (1815), 1777 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 1815 transitions. [2024-11-13 23:38:10,399 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 1815 transitions. Word has length 1333 [2024-11-13 23:38:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:10,400 INFO L471 AbstractCegarLoop]: Abstraction has 1778 states and 1815 transitions. [2024-11-13 23:38:10,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:38:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 1815 transitions. [2024-11-13 23:38:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1727 [2024-11-13 23:38:10,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:10,422 INFO L215 NwaCegarLoop]: trace histogram [544, 543, 543, 32, 31, 31, 1, 1] [2024-11-13 23:38:10,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 23:38:10,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:10,623 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:38:10,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash 43619837, now seen corresponding path program 19 times [2024-11-13 23:38:10,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:10,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938072598] [2024-11-13 23:38:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:10,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 460835 backedges. 275812 proven. 6530 refuted. 0 times theorem prover too weak. 178493 trivial. 0 not checked. [2024-11-13 23:38:24,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938072598] [2024-11-13 23:38:24,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938072598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901726810] [2024-11-13 23:38:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:38:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:24,354 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 23:38:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:26,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 6950 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 23:38:26,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 460835 backedges. 368760 proven. 26173 refuted. 0 times theorem prover too weak. 65902 trivial. 0 not checked. [2024-11-13 23:38:29,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 460835 backedges. 368760 proven. 26173 refuted. 0 times theorem prover too weak. 65902 trivial. 0 not checked. [2024-11-13 23:38:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901726810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233275377] [2024-11-13 23:38:33,391 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:38:33,391 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:33,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:33,391 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:33,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:34,258 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:34,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '128246#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_4943| Int)) (and (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_4943| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4943|))) (<= 0 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-13 23:38:34,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:34,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:34,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 52, 52] total 129 [2024-11-13 23:38:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033020467] [2024-11-13 23:38:34,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:34,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-13 23:38:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-13 23:38:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2583, Invalid=15239, Unknown=0, NotChecked=0, Total=17822 [2024-11-13 23:38:34,594 INFO L87 Difference]: Start difference. First operand 1778 states and 1815 transitions. Second operand has 129 states, 129 states have (on average 3.5736434108527133) internal successors, (461), 129 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:39:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:17,673 INFO L93 Difference]: Finished difference Result 1778 states and 1807 transitions. [2024-11-13 23:39:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 403 states. [2024-11-13 23:39:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.5736434108527133) internal successors, (461), 129 states have internal predecessors, (461), 0 states have call successors, (0), 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 1726 [2024-11-13 23:39:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:17,677 INFO L225 Difference]: With dead ends: 1778 [2024-11-13 23:39:17,677 INFO L226 Difference]: Without dead ends: 1778 [2024-11-13 23:39:17,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5606 GetRequests, 5074 SyntacticMatches, 25 SemanticMatches, 507 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70763 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=44433, Invalid=214139, Unknown=0, NotChecked=0, Total=258572 [2024-11-13 23:39:17,692 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15798 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 15798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:17,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 15838 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 15798 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-11-13 23:39:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2024-11-13 23:39:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1778. [2024-11-13 23:39:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.0168823860438942) internal successors, (1807), 1777 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:39:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 1807 transitions. [2024-11-13 23:39:17,712 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 1807 transitions. Word has length 1726 [2024-11-13 23:39:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:17,713 INFO L471 AbstractCegarLoop]: Abstraction has 1778 states and 1807 transitions. [2024-11-13 23:39:17,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.5736434108527133) internal successors, (461), 129 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:39:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 1807 transitions. [2024-11-13 23:39:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1742 [2024-11-13 23:39:17,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:17,734 INFO L215 NwaCegarLoop]: trace histogram [549, 548, 548, 32, 31, 31, 1, 1] [2024-11-13 23:39:17,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 23:39:17,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:17,935 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:39:17,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1416085825, now seen corresponding path program 20 times [2024-11-13 23:39:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17846630] [2024-11-13 23:39:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 469175 backedges. 254977 proven. 3225 refuted. 0 times theorem prover too weak. 210973 trivial. 0 not checked. [2024-11-13 23:39:31,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17846630] [2024-11-13 23:39:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17846630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265617169] [2024-11-13 23:39:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:39:31,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:31,008 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:31,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 23:39:39,210 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-11-13 23:39:39,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:39,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 23:39:39,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 469175 backedges. 96714 proven. 4466 refuted. 0 times theorem prover too weak. 367995 trivial. 0 not checked. [2024-11-13 23:39:43,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 469175 backedges. 96714 proven. 4466 refuted. 0 times theorem prover too weak. 367995 trivial. 0 not checked. [2024-11-13 23:39:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265617169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:39:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087415255] [2024-11-13 23:39:50,022 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-13 23:39:50,022 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:50,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:50,022 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:50,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:50,773 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:51,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143186#(and (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~i~0#1_5091| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_5091|) (<= 32 (mod |v_ULTIMATE.start_foo_~i~0#1_5091| 4294967296)))))' at error location [2024-11-13 23:39:51,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:51,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:39:51,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 69, 69] total 189 [2024-11-13 23:39:51,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522533801] [2024-11-13 23:39:51,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:51,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2024-11-13 23:39:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2024-11-13 23:39:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=32774, Unknown=0, NotChecked=0, Total=37442 [2024-11-13 23:39:51,271 INFO L87 Difference]: Start difference. First operand 1778 states and 1807 transitions. Second operand has 189 states, 189 states have (on average 2.9735449735449735) internal successors, (562), 189 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:00,609 INFO L93 Difference]: Finished difference Result 1978 states and 2010 transitions. [2024-11-13 23:40:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-13 23:40:00,610 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.9735449735449735) internal successors, (562), 189 states have internal predecessors, (562), 0 states have call successors, (0), 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 1741 [2024-11-13 23:40:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:00,612 INFO L225 Difference]: With dead ends: 1978 [2024-11-13 23:40:00,612 INFO L226 Difference]: Without dead ends: 1978 [2024-11-13 23:40:00,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5405 GetRequests, 5084 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29277 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=15324, Invalid=87396, Unknown=0, NotChecked=0, Total=102720 [2024-11-13 23:40:00,617 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 432 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:00,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 0 Invalid, 4216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 23:40:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2024-11-13 23:40:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1778. [2024-11-13 23:40:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.0129431626336522) internal successors, (1800), 1777 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 1800 transitions. [2024-11-13 23:40:00,628 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 1800 transitions. Word has length 1741 [2024-11-13 23:40:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:00,628 INFO L471 AbstractCegarLoop]: Abstraction has 1778 states and 1800 transitions. [2024-11-13 23:40:00,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.9735449735449735) internal successors, (562), 189 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 1800 transitions. [2024-11-13 23:40:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1757 [2024-11-13 23:40:00,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:00,641 INFO L215 NwaCegarLoop]: trace histogram [554, 553, 553, 32, 31, 31, 1, 1] [2024-11-13 23:40:00,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 23:40:00,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 23:40:00,842 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-13 23:40:00,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash 378043373, now seen corresponding path program 21 times [2024-11-13 23:40:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:00,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826424587] [2024-11-13 23:40:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 477590 backedges. 247217 proven. 3471 refuted. 0 times theorem prover too weak. 226902 trivial. 0 not checked. [2024-11-13 23:40:13,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826424587] [2024-11-13 23:40:13,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826424587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444856039] [2024-11-13 23:40:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:40:13,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:13,768 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fb988bf-a85b-48e3-904a-6bc06cb0b2d2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process