./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/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_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/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 64bit --witnessprinter.graph.data.programhash fca5cc24d72663534ebec1f9dc14e35435ad722dffdf26757e6dcfe47c5f2a9e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:35:08,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:35:08,558 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-13 23:35:08,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:35:08,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:35:08,588 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:35:08,589 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:35:08,589 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:35:08,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:35:08,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:35:08,590 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:35:08,590 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:35:08,590 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:35:08,591 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:35:08,592 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:35:08,592 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:35:08,592 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:35:08,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 23:35:08,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 23:35:08,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:35:08,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:35:08,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:35:08,593 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 23:35:08,593 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 23:35:08,593 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:35:08,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:35:08,594 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:35:08,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:35:08,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:35:08,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:35:08,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:35:08,595 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:35:08,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:35:08,596 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:35:08,596 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:35:08,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:35:08,596 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_2b762f45-79fa-4437-ba4c-c725b9aef4b9/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fca5cc24d72663534ebec1f9dc14e35435ad722dffdf26757e6dcfe47c5f2a9e [2024-11-13 23:35:08,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:35:08,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:35:08,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:35:08,984 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:35:08,984 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:35:08,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/memsafety-broom/sll.i Unable to find full path for "g++" [2024-11-13 23:35:10,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:35:11,390 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:35:11,391 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/sv-benchmarks/c/memsafety-broom/sll.i [2024-11-13 23:35:11,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/data/3c7972955/8f761d1f0c0b4942bc797a1f00c503ef/FLAG8f3fa53b4 [2024-11-13 23:35:11,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/data/3c7972955/8f761d1f0c0b4942bc797a1f00c503ef [2024-11-13 23:35:11,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:35:11,448 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:35:11,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:35:11,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:35:11,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:35:11,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a0e16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11, skipping insertion in model container [2024-11-13 23:35:11,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:35:11,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:35:11,831 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:35:11,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:35:11,895 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:35:11,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11 WrapperNode [2024-11-13 23:35:11,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:35:11,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:35:11,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:35:11,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:35:11,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,940 INFO L138 Inliner]: procedures = 118, calls = 14, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 51 [2024-11-13 23:35:11,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:35:11,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:35:11,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:35:11,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:35:11,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:35:11,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:35:11,981 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:35:11,981 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:35:11,986 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (1/1) ... [2024-11-13 23:35:11,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:35:12,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:12,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:35:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:35:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-13 23:35:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-13 23:35:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 23:35:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-13 23:35:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-13 23:35:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:35:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:35:12,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:35:12,178 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:35:12,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:35:12,398 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-11-13 23:35:12,398 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:35:12,446 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:35:12,446 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 23:35:12,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:35:12 BoogieIcfgContainer [2024-11-13 23:35:12,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:35:12,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:35:12,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:35:12,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:35:12,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:35:11" (1/3) ... [2024-11-13 23:35:12,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75197ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:35:12, skipping insertion in model container [2024-11-13 23:35:12,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:35:11" (2/3) ... [2024-11-13 23:35:12,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75197ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:35:12, skipping insertion in model container [2024-11-13 23:35:12,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:35:12" (3/3) ... [2024-11-13 23:35:12,456 INFO L112 eAbstractionObserver]: Analyzing ICFG sll.i [2024-11-13 23:35:12,472 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:35:12,474 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll.i that has 2 procedures, 35 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-13 23:35:12,513 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:35:12,525 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;@1540033b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:35:12,525 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-13 23:35:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:35:12,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:12,539 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:35:12,540 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:12,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash 3559546, now seen corresponding path program 1 times [2024-11-13 23:35:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:12,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007074749] [2024-11-13 23:35:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:12,838 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 23:35:12,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:12,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007074749] [2024-11-13 23:35:12,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007074749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:12,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:12,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:35:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644235668] [2024-11-13 23:35:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:12,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:35:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:35:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:35:12,871 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:12,968 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-13 23:35:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:35:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 23:35:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:12,977 INFO L225 Difference]: With dead ends: 34 [2024-11-13 23:35:12,978 INFO L226 Difference]: Without dead ends: 33 [2024-11-13 23:35:12,980 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 23:35:12,985 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:12,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-13 23:35:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-13 23:35:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-11-13 23:35:13,017 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 4 [2024-11-13 23:35:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:13,017 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-11-13 23:35:13,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-11-13 23:35:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:35:13,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:13,018 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:35:13,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:35:13,018 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:13,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 3559547, now seen corresponding path program 1 times [2024-11-13 23:35:13,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:13,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310426721] [2024-11-13 23:35:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:13,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:13,125 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 23:35:13,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:13,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310426721] [2024-11-13 23:35:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310426721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:13,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:35:13,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485121524] [2024-11-13 23:35:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:13,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:35:13,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:35:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:35:13,132 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:13,184 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-13 23:35:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:35:13,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 23:35:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:13,186 INFO L225 Difference]: With dead ends: 32 [2024-11-13 23:35:13,186 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 23:35:13,187 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 23:35:13,187 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:13,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:35:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 23:35:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-13 23:35:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-13 23:35:13,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 4 [2024-11-13 23:35:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:13,196 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-13 23:35:13,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:35:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-13 23:35:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:35:13,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:13,197 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:13,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:35:13,197 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:13,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -54404052, now seen corresponding path program 1 times [2024-11-13 23:35:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:13,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983387067] [2024-11-13 23:35:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:13,426 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 23:35:13,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:13,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983387067] [2024-11-13 23:35:13,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983387067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:13,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:35:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605973217] [2024-11-13 23:35:13,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:13,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:35:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:35:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:35:13,430 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:13,565 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-11-13 23:35:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:35:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-13 23:35:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:13,568 INFO L225 Difference]: With dead ends: 38 [2024-11-13 23:35:13,568 INFO L226 Difference]: Without dead ends: 38 [2024-11-13 23:35:13,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:35:13,569 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:13,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-13 23:35:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-13 23:35:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-11-13 23:35:13,582 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 11 [2024-11-13 23:35:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:13,584 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-11-13 23:35:13,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-11-13 23:35:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:35:13,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:13,585 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:13,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:35:13,585 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:13,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash -54404051, now seen corresponding path program 1 times [2024-11-13 23:35:13,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:13,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262075317] [2024-11-13 23:35:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:13,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:13,948 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 23:35:13,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262075317] [2024-11-13 23:35:13,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262075317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:13,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:13,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 23:35:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265107290] [2024-11-13 23:35:13,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:13,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:35:13,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:35:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:13,950 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:14,123 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-13 23:35:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:35:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-13 23:35:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:14,125 INFO L225 Difference]: With dead ends: 38 [2024-11-13 23:35:14,125 INFO L226 Difference]: Without dead ends: 38 [2024-11-13 23:35:14,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:14,126 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:14,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 103 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:35:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-13 23:35:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-13 23:35:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-13 23:35:14,134 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 11 [2024-11-13 23:35:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:14,134 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-13 23:35:14,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-13 23:35:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 23:35:14,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:14,138 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:14,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:35:14,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:14,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1686478029, now seen corresponding path program 1 times [2024-11-13 23:35:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:14,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818379666] [2024-11-13 23:35:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:14,270 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 23:35:14,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818379666] [2024-11-13 23:35:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818379666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:14,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:35:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115279652] [2024-11-13 23:35:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:14,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:35:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:35:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:14,272 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:14,352 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-13 23:35:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:35:14,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-13 23:35:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:14,353 INFO L225 Difference]: With dead ends: 39 [2024-11-13 23:35:14,354 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 23:35:14,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:14,355 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:14,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 23:35:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-13 23:35:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-13 23:35:14,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2024-11-13 23:35:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:14,360 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-13 23:35:14,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-13 23:35:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 23:35:14,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:14,361 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:14,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 23:35:14,361 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:14,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash -690334404, now seen corresponding path program 1 times [2024-11-13 23:35:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836408245] [2024-11-13 23:35:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:35:14,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:14,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836408245] [2024-11-13 23:35:14,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836408245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264428980] [2024-11-13 23:35:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:14,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:14,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:35:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:14,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 23:35:14,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:14,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:14,847 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-13 23:35:14,901 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 23:35:14,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 23:35:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-13 23:35:14,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264428980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61171989] [2024-11-13 23:35:15,044 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:35:15,044 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:15,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:15,059 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:15,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:15,680 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 64 for LOIs [2024-11-13 23:35:15,823 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:19,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '475#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret6#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_21| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_21|) 1)) (or (and (exists ((|v_#memory_$Pointer$.base_35| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_35| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_35| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (exists ((|v_#valid_49| (Array Int Int))) (= (select |v_#valid_49| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_21|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_34| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_34| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_34| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_34| (Array Int Int))) (= |#length| (store |v_#length_34| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_12| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_12| 0)) (<= |v_ULTIMATE.start_create_#t~nondet5#1_12| 2147483647))) (exists ((|v_#valid_48| (Array Int Int))) (and (= (select |v_#valid_48| |ULTIMATE.start_create_#t~ret6#1.base|) 0) (= (store |v_#valid_48| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|)))) (and (= |ULTIMATE.start_create_~sll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_21|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#length_33| (Array Int Int))) (= |#length| (store |v_#length_33| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (exists ((|v_#memory_$Pointer$.offset_34| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_34| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_34| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_36| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_36| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_36| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_48| (Array Int Int))) (= (select |v_#valid_48| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_12| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_12| 0)) (<= |v_ULTIMATE.start_create_#t~nondet5#1_12| 2147483647))) (exists ((|v_#valid_50| (Array Int Int))) (and (= (select |v_#valid_50| |ULTIMATE.start_create_#t~ret6#1.base|) 0) (= (store |v_#valid_50| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|))))))))' at error location [2024-11-13 23:35:19,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:19,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:35:19,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2024-11-13 23:35:19,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29521239] [2024-11-13 23:35:19,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:19,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:35:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:35:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=290, Unknown=2, NotChecked=34, Total=380 [2024-11-13 23:35:19,570 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:19,822 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-13 23:35:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:35:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 13 [2024-11-13 23:35:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:19,823 INFO L225 Difference]: With dead ends: 39 [2024-11-13 23:35:19,823 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 23:35:19,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=65, Invalid=357, Unknown=2, NotChecked=38, Total=462 [2024-11-13 23:35:19,826 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:19,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 101 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2024-11-13 23:35:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 23:35:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-13 23:35:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.625) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-13 23:35:19,831 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 13 [2024-11-13 23:35:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:19,831 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-13 23:35:19,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-13 23:35:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 23:35:19,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:19,832 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:19,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:35:20,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:20,037 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:20,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -690334403, now seen corresponding path program 1 times [2024-11-13 23:35:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:20,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141174897] [2024-11-13 23:35:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:35:20,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141174897] [2024-11-13 23:35:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141174897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:20,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617421560] [2024-11-13 23:35:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:20,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:20,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:20,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:35:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:20,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:35:20,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:20,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:20,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:35:20,578 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-13 23:35:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:35:20,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-13 23:35:20,614 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:35:20,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:35:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-13 23:35:20,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:20,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617421560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932595829] [2024-11-13 23:35:20,768 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:35:20,768 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:20,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:20,769 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:20,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:20,995 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 64 for LOIs [2024-11-13 23:35:21,069 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:22,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '622#(and (exists ((|v_ULTIMATE.start_create_~now~0#1.base_22| Int)) (and (or (and (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#length_45| (Array Int Int))) (= |#length| (store |v_#length_45| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (exists ((|v_#valid_59| (Array Int Int))) (and (= (store |v_#valid_59| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|) (= (select |v_#valid_59| |ULTIMATE.start_create_#t~ret6#1.base|) 0))) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (exists ((|v_#valid_61| (Array Int Int))) (= (select |v_#valid_61| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_13| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet5#1_13| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_13| 0)))) (exists ((|v_#memory_$Pointer$.offset_44| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_44| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_44| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_~sll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_22|) (exists ((|v_#memory_$Pointer$.base_44| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_44| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_44| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0))))) (and (exists ((|v_#valid_60| (Array Int Int))) (and (= (store |v_#valid_60| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|) (= (select |v_#valid_60| |ULTIMATE.start_create_#t~ret6#1.base|) 0))) (exists ((|v_#memory_$Pointer$.base_42| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_42| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_42| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_43| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_43| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_43| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (exists ((|v_#length_45| (Array Int Int))) (= |#length| (store |v_#length_45| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_13| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet5#1_13| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_13| 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_59| (Array Int Int))) (= (select |v_#valid_59| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_22|))) (<= (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_22|) 7))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_#t~ret6#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0))' at error location [2024-11-13 23:35:22,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:22,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:35:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2024-11-13 23:35:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596827186] [2024-11-13 23:35:22,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:22,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 23:35:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 23:35:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=398, Unknown=1, NotChecked=40, Total=506 [2024-11-13 23:35:22,612 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:22,870 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-11-13 23:35:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:35:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 13 [2024-11-13 23:35:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:22,871 INFO L225 Difference]: With dead ends: 40 [2024-11-13 23:35:22,871 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 23:35:22,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=79, Invalid=476, Unknown=1, NotChecked=44, Total=600 [2024-11-13 23:35:22,873 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:22,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 107 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2024-11-13 23:35:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 23:35:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-13 23:35:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-13 23:35:22,885 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 13 [2024-11-13 23:35:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:22,886 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-13 23:35:22,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-13 23:35:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 23:35:22,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:22,887 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:22,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:23,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:23,088 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:23,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -742646634, now seen corresponding path program 1 times [2024-11-13 23:35:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:23,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813518342] [2024-11-13 23:35:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:23,336 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 23:35:23,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813518342] [2024-11-13 23:35:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813518342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307838103] [2024-11-13 23:35:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:23,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:23,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:35:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:23,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:35:23,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:23,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:23,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:23,585 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 23:35:23,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:23,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-13 23:35:24,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-13 23:35:24,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-13 23:35:24,012 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 34 treesize of output 32 [2024-11-13 23:35:24,046 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 23:35:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307838103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:24,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975224812] [2024-11-13 23:35:24,048 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-13 23:35:24,048 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:24,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:24,049 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:24,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:24,209 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-13 23:35:24,218 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [975224812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:25,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 8, 8] total 26 [2024-11-13 23:35:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846766510] [2024-11-13 23:35:25,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:25,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:35:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:35:25,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:35:25,105 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:25,456 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-13 23:35:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:35:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-13 23:35:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:25,457 INFO L225 Difference]: With dead ends: 45 [2024-11-13 23:35:25,457 INFO L226 Difference]: Without dead ends: 45 [2024-11-13 23:35:25,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:35:25,458 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:25,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:35:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-13 23:35:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-13 23:35:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-13 23:35:25,469 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 13 [2024-11-13 23:35:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:25,469 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-13 23:35:25,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-13 23:35:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 23:35:25,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:25,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:25,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:35:25,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:25,670 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:25,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1547161591, now seen corresponding path program 1 times [2024-11-13 23:35:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:25,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871991123] [2024-11-13 23:35:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:25,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871991123] [2024-11-13 23:35:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871991123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:25,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:25,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 23:35:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439866727] [2024-11-13 23:35:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:25,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:35:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:25,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:35:25,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:25,757 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:25,873 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2024-11-13 23:35:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:35:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-13 23:35:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:25,875 INFO L225 Difference]: With dead ends: 45 [2024-11-13 23:35:25,875 INFO L226 Difference]: Without dead ends: 45 [2024-11-13 23:35:25,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:35:25,877 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:25,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-13 23:35:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-13 23:35:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 39 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-13 23:35:25,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2024-11-13 23:35:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:25,887 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-13 23:35:25,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-13 23:35:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 23:35:25,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:25,888 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:25,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 23:35:25,889 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:25,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1547161590, now seen corresponding path program 1 times [2024-11-13 23:35:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:25,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037974757] [2024-11-13 23:35:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:26,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037974757] [2024-11-13 23:35:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037974757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:35:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080990539] [2024-11-13 23:35:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:26,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:35:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:35:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,068 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:26,189 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-11-13 23:35:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:35:26,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-13 23:35:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:26,191 INFO L225 Difference]: With dead ends: 46 [2024-11-13 23:35:26,191 INFO L226 Difference]: Without dead ends: 46 [2024-11-13 23:35:26,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,192 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:26,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-13 23:35:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-13 23:35:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-13 23:35:26,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 14 [2024-11-13 23:35:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:26,196 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-13 23:35:26,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-13 23:35:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 23:35:26,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:26,197 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:26,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 23:35:26,197 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:26,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1547160492, now seen corresponding path program 1 times [2024-11-13 23:35:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349399193] [2024-11-13 23:35:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:26,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349399193] [2024-11-13 23:35:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349399193] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:26,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 23:35:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210520377] [2024-11-13 23:35:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:26,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:35:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:35:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,272 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:26,350 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-13 23:35:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:35:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-13 23:35:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:26,352 INFO L225 Difference]: With dead ends: 52 [2024-11-13 23:35:26,352 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 23:35:26,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,353 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:26,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 23:35:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-11-13 23:35:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.4375) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-13 23:35:26,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 14 [2024-11-13 23:35:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:26,364 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-13 23:35:26,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-13 23:35:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 23:35:26,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:26,364 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:26,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 23:35:26,365 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:26,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -763575578, now seen corresponding path program 1 times [2024-11-13 23:35:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:26,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124065337] [2024-11-13 23:35:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124065337] [2024-11-13 23:35:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124065337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:26,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:35:26,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:35:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468035818] [2024-11-13 23:35:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:26,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:35:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:35:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,496 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:26,595 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-11-13 23:35:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:35:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-13 23:35:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:26,597 INFO L225 Difference]: With dead ends: 51 [2024-11-13 23:35:26,598 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 23:35:26,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 23:35:26,599 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:26,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 23:35:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-13 23:35:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 44 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-13 23:35:26,606 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2024-11-13 23:35:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:26,606 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-13 23:35:26,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-13 23:35:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:35:26,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:26,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:26,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 23:35:26,607 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:26,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash 219686716, now seen corresponding path program 1 times [2024-11-13 23:35:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171235666] [2024-11-13 23:35:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:35:26,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171235666] [2024-11-13 23:35:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171235666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058689752] [2024-11-13 23:35:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:26,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:26,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:35:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:26,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:35:26,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:35:26,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:26,837 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 23:35:26,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 23:35:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:35:26,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058689752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:26,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902335352] [2024-11-13 23:35:26,861 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:35:26,861 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:26,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:26,862 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:26,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:27,603 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:27,621 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:28,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1429#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)) (= |ULTIMATE.start_loop_~node~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~l~0#1.base|) 1)))' at error location [2024-11-13 23:35:28,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:28,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:28,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-11-13 23:35:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011635531] [2024-11-13 23:35:28,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:28,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:35:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:35:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:35:28,506 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:28,595 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-13 23:35:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:35:28,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-13 23:35:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:28,596 INFO L225 Difference]: With dead ends: 56 [2024-11-13 23:35:28,596 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 23:35:28,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:35:28,597 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:28,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 98 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 23:35:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-13 23:35:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-11-13 23:35:28,607 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 19 [2024-11-13 23:35:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:28,608 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-11-13 23:35:28,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-11-13 23:35:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:35:28,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:28,610 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:28,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:35:28,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 23:35:28,811 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:28,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 219686717, now seen corresponding path program 1 times [2024-11-13 23:35:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:28,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215655211] [2024-11-13 23:35:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:29,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215655211] [2024-11-13 23:35:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215655211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065962203] [2024-11-13 23:35:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:29,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:29,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:35:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:29,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:35:29,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:29,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:29,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:35:29,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2024-11-13 23:35:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:29,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065962203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:29,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039873383] [2024-11-13 23:35:29,399 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:35:29,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:29,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:29,400 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:29,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:30,002 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:30,018 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:31,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1676#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_main_~l~0#1.base|) 7) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)))' at error location [2024-11-13 23:35:31,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:31,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:31,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-13 23:35:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645657122] [2024-11-13 23:35:31,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:31,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:35:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:35:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:35:31,012 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 15 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:35:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:31,149 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-13 23:35:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:35:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2024-11-13 23:35:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:31,150 INFO L225 Difference]: With dead ends: 56 [2024-11-13 23:35:31,150 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 23:35:31,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:35:31,151 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:31,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 265 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 23:35:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-13 23:35:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.45) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-13 23:35:31,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2024-11-13 23:35:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:31,159 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-13 23:35:31,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:35:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-13 23:35:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:35:31,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:31,161 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:31,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:35:31,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 23:35:31,366 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:31,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1533147585, now seen corresponding path program 1 times [2024-11-13 23:35:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:31,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755508380] [2024-11-13 23:35:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:35:31,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:31,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755508380] [2024-11-13 23:35:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755508380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710671620] [2024-11-13 23:35:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:31,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:31,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:31,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:35:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:31,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 23:35:31,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:31,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:31,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:31,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:35:31,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:35:31,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:35:31,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:35:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:31,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:31,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 23:35:31,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-13 23:35:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710671620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746925114] [2024-11-13 23:35:31,898 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-13 23:35:31,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:31,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:31,898 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:31,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:32,109 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-13 23:35:32,119 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1746925114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:35:33,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:33,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 11, 11] total 28 [2024-11-13 23:35:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125241798] [2024-11-13 23:35:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:35:33,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:35:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:35:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:35:33,401 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:33,954 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-11-13 23:35:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 23:35:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-13 23:35:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:33,955 INFO L225 Difference]: With dead ends: 61 [2024-11-13 23:35:33,955 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 23:35:33,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:35:33,956 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:33,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:35:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 23:35:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2024-11-13 23:35:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.441860465116279) internal successors, (62), 52 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-13 23:35:33,967 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 19 [2024-11-13 23:35:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:33,967 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-13 23:35:33,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-13 23:35:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:35:33,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:33,968 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:33,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:34,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 23:35:34,169 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:34,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1533146486, now seen corresponding path program 1 times [2024-11-13 23:35:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287857329] [2024-11-13 23:35:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:34,325 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 23:35:34,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287857329] [2024-11-13 23:35:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287857329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994759251] [2024-11-13 23:35:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:34,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:34,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:34,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:35:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:34,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:35:34,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:34,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 23:35:34,474 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 23:35:34,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:34,531 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_37| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_37|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_37| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-13 23:35:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994759251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491572363] [2024-11-13 23:35:34,534 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:35:34,534 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:34,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:34,535 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:34,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:34,697 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-13 23:35:34,705 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:36,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2166#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#length_91| (Array Int Int)) (|v_#valid_113| (Array Int Int)) (|v_ULTIMATE.start_destroy_~l#1.base_30| Int) (|v_#memory_$Pointer$.base_102| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_102| (Array Int (Array Int Int)))) (and (= (select |v_#valid_113| |v_ULTIMATE.start_destroy_~l#1.base_30|) 0) (= (store |v_#valid_113| |v_ULTIMATE.start_destroy_~l#1.base_30| 0) |#valid|) (= (store |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_destroy_~l#1.base_30| (store (select |v_#memory_$Pointer$.offset_102| |v_ULTIMATE.start_destroy_~l#1.base_30|) 0 0)) |#memory_$Pointer$.offset|) (= (store |v_#length_91| |v_ULTIMATE.start_destroy_~l#1.base_30| 8) |#length|) (<= (+ |v_ULTIMATE.start_destroy_~l#1.base_30| 1) |#StackHeapBarrier|) (not (= |v_ULTIMATE.start_destroy_~l#1.base_30| 0)) (= (store |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_destroy_~l#1.base_30| (store (select |v_#memory_$Pointer$.base_102| |v_ULTIMATE.start_destroy_~l#1.base_30|) 0 0)) |#memory_$Pointer$.base|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (and (= (select |v_ULTIMATE.start_main_old_#valid#1_10| 0) 0) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|)))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:35:36,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:36,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:35:36,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2024-11-13 23:35:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200506714] [2024-11-13 23:35:36,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:36,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:35:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:35:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=589, Unknown=1, NotChecked=48, Total=702 [2024-11-13 23:35:36,122 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:36,273 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-11-13 23:35:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:35:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-13 23:35:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:36,274 INFO L225 Difference]: With dead ends: 68 [2024-11-13 23:35:36,274 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 23:35:36,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=64, Invalid=589, Unknown=1, NotChecked=48, Total=702 [2024-11-13 23:35:36,275 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:36,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 23:35:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-11-13 23:35:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-11-13 23:35:36,279 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 19 [2024-11-13 23:35:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:36,280 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-11-13 23:35:36,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 23:35:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-11-13 23:35:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:35:36,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:36,283 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:36,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:36,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 23:35:36,484 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:36,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash 717888588, now seen corresponding path program 1 times [2024-11-13 23:35:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111247255] [2024-11-13 23:35:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:36,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:36,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:36,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111247255] [2024-11-13 23:35:36,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111247255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:36,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336904712] [2024-11-13 23:35:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:36,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:36,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:36,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:35:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:36,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 23:35:36,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:36,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:36,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:35:36,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-13 23:35:36,813 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-11-13 23:35:36,827 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-13 23:35:36,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-13 23:35:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-13 23:35:36,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336904712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368516188] [2024-11-13 23:35:36,953 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-13 23:35:36,953 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:36,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:36,953 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:36,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:37,554 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 32 for LOIs [2024-11-13 23:35:37,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:40,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2444#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#length_106| (Array Int Int))) (= |#length| (store |v_#length_106| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (exists ((|v_#valid_136| (Array Int Int))) (and (= (select |v_#valid_136| |ULTIMATE.start_create_#t~ret6#1.base|) 0) (= (store |v_#valid_136| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|))) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (= |ULTIMATE.start_create_#t~ret6#1.offset| 0) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_43| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet5#1_43| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_43| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_43| 0)))) (exists ((|v_#memory_$Pointer$.base_119| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_119| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_119| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_49| Int)) (not (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_49|) 1))) (exists ((|v_#memory_$Pointer$.offset_118| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_118| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_118| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))))' at error location [2024-11-13 23:35:40,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:40,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:40,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 11 [2024-11-13 23:35:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807265004] [2024-11-13 23:35:40,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:40,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 23:35:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 23:35:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=357, Unknown=2, NotChecked=38, Total=462 [2024-11-13 23:35:40,280 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 23:35:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:40,556 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-13 23:35:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:35:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 21 [2024-11-13 23:35:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:40,557 INFO L225 Difference]: With dead ends: 62 [2024-11-13 23:35:40,557 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 23:35:40,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=87, Invalid=515, Unknown=2, NotChecked=46, Total=650 [2024-11-13 23:35:40,558 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:40,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 149 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2024-11-13 23:35:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 23:35:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-13 23:35:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-11-13 23:35:40,567 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 21 [2024-11-13 23:35:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:40,567 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-11-13 23:35:40,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 23:35:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-11-13 23:35:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:35:40,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:40,568 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:40,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:40,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:35:40,769 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:40,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 717888589, now seen corresponding path program 1 times [2024-11-13 23:35:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556259370] [2024-11-13 23:35:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:41,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556259370] [2024-11-13 23:35:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556259370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068289754] [2024-11-13 23:35:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:41,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:41,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:35:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:41,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:35:41,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:41,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:35:41,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:41,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:35:41,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:41,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-13 23:35:41,390 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-13 23:35:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:35:41,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-13 23:35:41,413 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:35:41,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:35:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-13 23:35:41,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:41,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068289754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001520740] [2024-11-13 23:35:41,529 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-13 23:35:41,529 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:41,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:41,529 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:41,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:42,073 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 32 for LOIs [2024-11-13 23:35:42,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:42,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2672#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_#t~ret6#1.base| 0)) (= |ULTIMATE.start_create_#t~ret6#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_132| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_132| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.base_132| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (exists ((|v_#length_118| (Array Int Int))) (= |#length| (store |v_#length_118| |ULTIMATE.start_create_#t~ret6#1.base| 8))) (exists ((|v_ULTIMATE.start_create_#t~nondet5#1_47| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet5#1_47| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet5#1_47| 0)) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet5#1_47| 2147483648)))) (exists ((|v_#memory_$Pointer$.offset_131| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_131| |ULTIMATE.start_create_#t~ret6#1.base| (store (select |v_#memory_$Pointer$.offset_131| |ULTIMATE.start_create_#t~ret6#1.base|) 0 0)))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (<= (+ |ULTIMATE.start_create_#t~ret6#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_147| (Array Int Int))) (and (= (store |v_#valid_147| |ULTIMATE.start_create_#t~ret6#1.base| 1) |#valid|) (= (select |v_#valid_147| |ULTIMATE.start_create_#t~ret6#1.base|) 0))))' at error location [2024-11-13 23:35:42,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:42,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:35:42,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-13 23:35:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598270053] [2024-11-13 23:35:42,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:42,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 23:35:42,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 23:35:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=670, Unknown=1, NotChecked=52, Total=812 [2024-11-13 23:35:42,820 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 23:35:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:43,156 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-11-13 23:35:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:35:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2024-11-13 23:35:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:43,157 INFO L225 Difference]: With dead ends: 60 [2024-11-13 23:35:43,157 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 23:35:43,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=876, Unknown=1, NotChecked=60, Total=1056 [2024-11-13 23:35:43,158 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:43,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 258 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2024-11-13 23:35:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 23:35:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-13 23:35:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-13 23:35:43,162 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 21 [2024-11-13 23:35:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:43,163 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-13 23:35:43,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 23:35:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-13 23:35:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:35:43,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:43,164 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:43,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:43,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:35:43,364 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:43,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash 665576358, now seen corresponding path program 1 times [2024-11-13 23:35:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270078180] [2024-11-13 23:35:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:35:43,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270078180] [2024-11-13 23:35:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270078180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559146781] [2024-11-13 23:35:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:43,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:43,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:43,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:35:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:43,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 23:35:43,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:43,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:43,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:35:43,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-13 23:35:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:43,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:43,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-11-13 23:35:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559146781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180587241] [2024-11-13 23:35:43,787 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:35:43,787 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:43,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:43,787 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:43,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:44,257 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:44,289 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:45,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2940#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_46| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_46|) 1)) (or (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_46| 0))))))' at error location [2024-11-13 23:35:45,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:45,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:45,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-11-13 23:35:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618388658] [2024-11-13 23:35:45,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:45,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:35:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:35:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:35:45,056 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:45,201 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-13 23:35:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:35:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-11-13 23:35:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:45,202 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:35:45,202 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:35:45,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:35:45,203 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:45,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:35:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-13 23:35:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.36) internal successors, (68), 56 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-11-13 23:35:45,207 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 21 [2024-11-13 23:35:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:45,207 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-11-13 23:35:45,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-11-13 23:35:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 23:35:45,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:45,208 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:45,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:45,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:45,413 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:45,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 665576359, now seen corresponding path program 1 times [2024-11-13 23:35:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903780420] [2024-11-13 23:35:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:45,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903780420] [2024-11-13 23:35:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903780420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349203657] [2024-11-13 23:35:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:45,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:45,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:45,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:35:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:45,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 23:35:45,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:45,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:35:45,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:45,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:35:45,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-13 23:35:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:45,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:45,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-11-13 23:35:45,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2024-11-13 23:35:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:35:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:35:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349203657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130255332] [2024-11-13 23:35:46,074 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:35:46,074 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:46,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:46,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:46,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:46,590 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:46,605 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:49,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3214#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.offset_48| Int) (|v_ULTIMATE.start_loop_~node~0#1.base_53| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_loop_~node~0#1.base_53|) (+ |v_ULTIMATE.start_loop_~node~0#1.offset_48| 8)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_48| 0)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_53| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.offset_48| 0))))))' at error location [2024-11-13 23:35:49,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:49,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:49,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-13 23:35:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933356588] [2024-11-13 23:35:49,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:49,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 23:35:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 23:35:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2024-11-13 23:35:49,617 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:49,840 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-13 23:35:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:35:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-11-13 23:35:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:49,841 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:35:49,841 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:35:49,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2024-11-13 23:35:49,842 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:49,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:35:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:35:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-13 23:35:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.34) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-13 23:35:49,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 21 [2024-11-13 23:35:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:49,845 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-13 23:35:49,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-13 23:35:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 23:35:49,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:49,846 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:49,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 23:35:50,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-13 23:35:50,047 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:50,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash -841921799, now seen corresponding path program 1 times [2024-11-13 23:35:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:50,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285536474] [2024-11-13 23:35:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:35:50,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285536474] [2024-11-13 23:35:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285536474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57908743] [2024-11-13 23:35:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:50,131 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:35:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:50,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:35:50,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:50,250 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 23:35:50,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:50,266 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 23:35:50,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 23:35:50,285 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 23:35:50,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57908743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:50,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918714705] [2024-11-13 23:35:50,287 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-13 23:35:50,287 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:50,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:50,287 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:50,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:50,905 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:50,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:51,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3486#(and (exists ((|v_ULTIMATE.start_destroy_~l#1.base_33| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_destroy_~l#1.base_33|) 1)) (not (= |v_ULTIMATE.start_destroy_~l#1.base_33| 0)))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_destroy_~l#1.offset| 0))' at error location [2024-11-13 23:35:51,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:51,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2024-11-13 23:35:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285671068] [2024-11-13 23:35:51,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:51,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:35:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:35:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:35:51,757 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:51,860 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-11-13 23:35:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:35:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-11-13 23:35:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:51,861 INFO L225 Difference]: With dead ends: 67 [2024-11-13 23:35:51,861 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 23:35:51,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:35:51,862 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:51,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 93 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 23:35:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-11-13 23:35:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.32) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-11-13 23:35:51,865 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 22 [2024-11-13 23:35:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:51,865 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-11-13 23:35:51,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 23:35:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-11-13 23:35:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 23:35:51,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:51,866 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:51,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 23:35:52,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 23:35:52,072 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:52,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -841921798, now seen corresponding path program 1 times [2024-11-13 23:35:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964256390] [2024-11-13 23:35:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:52,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964256390] [2024-11-13 23:35:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964256390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466249395] [2024-11-13 23:35:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:52,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:52,348 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:52,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:35:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:52,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:35:52,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:52,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:35:52,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 23:35:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:52,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:52,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-13 23:35:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:35:52,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466249395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:35:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591541857] [2024-11-13 23:35:52,557 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-13 23:35:52,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:35:52,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:35:52,558 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:35:52,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:35:53,163 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:35:53,179 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:35:54,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3768#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_35| Int)) (and (<= (select |#length| |v_ULTIMATE.start_destroy_~l#1.base_35|) 7) (not (= |v_ULTIMATE.start_destroy_~l#1.base_35| 0)))))' at error location [2024-11-13 23:35:54,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:35:54,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:35:54,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2024-11-13 23:35:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121538742] [2024-11-13 23:35:54,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:35:54,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:35:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:35:54,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:35:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2024-11-13 23:35:54,224 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:35:54,304 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-11-13 23:35:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:35:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-13 23:35:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:35:54,309 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:35:54,309 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:35:54,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2024-11-13 23:35:54,311 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:35:54,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 187 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:35:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:35:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-13 23:35:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.3) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:35:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-11-13 23:35:54,317 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 22 [2024-11-13 23:35:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:35:54,317 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-11-13 23:35:54,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 23:35:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-11-13 23:35:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 23:35:54,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:35:54,318 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:35:54,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:35:54,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 23:35:54,518 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:35:54,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:35:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash -331207280, now seen corresponding path program 2 times [2024-11-13 23:35:54,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:35:54,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747593283] [2024-11-13 23:35:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:35:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:35:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:35:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:35:55,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:35:55,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747593283] [2024-11-13 23:35:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747593283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:35:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627804620] [2024-11-13 23:35:55,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:35:55,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:35:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:35:55,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:35:55,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:35:55,129 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:35:55,129 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:35:55,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 23:35:55,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:35:55,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:35:55,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:55,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:35:55,433 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:35:55,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:35:55,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 23:35:55,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 23:35:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:35:55,916 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-13 23:35:55,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 31 [2024-11-13 23:35:55,931 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 23:35:55,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2024-11-13 23:35:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:35:55,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:35:56,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:35:56,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1676 treesize of output 1675 [2024-11-13 23:35:57,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:35:57,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1571 treesize of output 1630 [2024-11-13 23:37:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627804620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:07,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118941033] [2024-11-13 23:37:07,492 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:37:07,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:07,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:07,493 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:07,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:08,104 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:08,118 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:14,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4039#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_76| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_76|) 1)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_76| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))))))' at error location [2024-11-13 23:37:14,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:14,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:37:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-13 23:37:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838300149] [2024-11-13 23:37:14,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:14,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 23:37:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 23:37:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1613, Unknown=1, NotChecked=0, Total=1722 [2024-11-13 23:37:14,291 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:15,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:15,711 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2024-11-13 23:37:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 23:37:15,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2024-11-13 23:37:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:15,712 INFO L225 Difference]: With dead ends: 64 [2024-11-13 23:37:15,712 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 23:37:15,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=157, Invalid=2292, Unknown=1, NotChecked=0, Total=2450 [2024-11-13 23:37:15,714 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:15,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 385 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:37:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 23:37:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-11-13 23:37:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 57 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-13 23:37:15,719 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 23 [2024-11-13 23:37:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:15,719 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-13 23:37:15,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-13 23:37:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 23:37:15,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:15,720 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:15,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:37:15,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 23:37:15,921 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:15,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1677443504, now seen corresponding path program 2 times [2024-11-13 23:37:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904844136] [2024-11-13 23:37:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:16,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904844136] [2024-11-13 23:37:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904844136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778976184] [2024-11-13 23:37:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:16,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:16,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:16,193 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:16,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:37:16,337 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:37:16,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:16,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:37:16,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:37:16,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:16,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:37:16,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:37:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:37:16,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778976184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605649607] [2024-11-13 23:37:16,793 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-13 23:37:16,793 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:16,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:16,794 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:16,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:17,263 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:17,282 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:18,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4347#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_37| Int)) (and (<= (select |#length| |v_ULTIMATE.start_destroy_~l#1.base_37|) 7) (not (= |v_ULTIMATE.start_destroy_~l#1.base_37| 0)))))' at error location [2024-11-13 23:37:18,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:18,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:18,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-13 23:37:18,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717744433] [2024-11-13 23:37:18,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:18,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 23:37:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 23:37:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2024-11-13 23:37:18,944 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:19,301 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2024-11-13 23:37:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:37:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-11-13 23:37:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:19,303 INFO L225 Difference]: With dead ends: 68 [2024-11-13 23:37:19,303 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 23:37:19,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2024-11-13 23:37:19,305 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:19,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 179 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:37:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 23:37:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-11-13 23:37:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 57 states have internal predecessors, (64), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-13 23:37:19,310 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 24 [2024-11-13 23:37:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:19,310 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-13 23:37:19,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-13 23:37:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 23:37:19,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:19,312 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:19,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 23:37:19,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 23:37:19,516 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:19,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1780721172, now seen corresponding path program 2 times [2024-11-13 23:37:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462053884] [2024-11-13 23:37:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:19,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462053884] [2024-11-13 23:37:19,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462053884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:19,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209446485] [2024-11-13 23:37:19,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:19,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:19,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 23:37:19,884 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:37:19,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:19,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 23:37:19,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:19,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:37:20,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:37:20,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:37:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:20,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:20,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 23:37:20,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-13 23:37:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209446485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504808945] [2024-11-13 23:37:20,479 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:37:20,482 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:20,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:20,483 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:20,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:20,708 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2024-11-13 23:37:20,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:23,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4652#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#valid_231| (Array Int Int)) (|v_#memory_$Pointer$.offset_239| (Array Int (Array Int Int))) (|v_ULTIMATE.start_destroy_~l#1.base_42| Int) (|v_#memory_$Pointer$.base_245| (Array Int (Array Int Int))) (|v_#length_197| (Array Int Int))) (and (not (= |v_ULTIMATE.start_destroy_~l#1.base_42| 0)) (= (store |v_#memory_$Pointer$.base_245| |v_ULTIMATE.start_destroy_~l#1.base_42| (store (select |v_#memory_$Pointer$.base_245| |v_ULTIMATE.start_destroy_~l#1.base_42|) 0 0)) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_239| |v_ULTIMATE.start_destroy_~l#1.base_42| (store (select |v_#memory_$Pointer$.offset_239| |v_ULTIMATE.start_destroy_~l#1.base_42|) 0 0))) (= |#length| (store |v_#length_197| |v_ULTIMATE.start_destroy_~l#1.base_42| 8)) (= (store |v_#valid_231| |v_ULTIMATE.start_destroy_~l#1.base_42| 0) |#valid|) (= (select |v_#valid_231| |v_ULTIMATE.start_destroy_~l#1.base_42|) 0) (<= (+ |v_ULTIMATE.start_destroy_~l#1.base_42| 1) |#StackHeapBarrier|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (and (= (select |v_ULTIMATE.start_main_old_#valid#1_11| 0) 0) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|)))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:37:23,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:23,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 17 [2024-11-13 23:37:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860147782] [2024-11-13 23:37:23,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:23,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 23:37:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 23:37:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2024-11-13 23:37:23,325 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:37:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:24,023 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2024-11-13 23:37:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 23:37:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-13 23:37:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:24,024 INFO L225 Difference]: With dead ends: 79 [2024-11-13 23:37:24,024 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 23:37:24,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 23:37:24,025 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:24,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 161 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:37:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 23:37:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2024-11-13 23:37:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 52 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-13 23:37:24,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 24 [2024-11-13 23:37:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:24,029 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-13 23:37:24,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 23:37:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-13 23:37:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 23:37:24,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:24,030 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:24,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 23:37:24,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 23:37:24,231 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:24,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1204133300, now seen corresponding path program 2 times [2024-11-13 23:37:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:24,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685759136] [2024-11-13 23:37:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:37:24,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:24,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685759136] [2024-11-13 23:37:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685759136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:24,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927520291] [2024-11-13 23:37:24,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:24,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:24,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:24,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:24,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 23:37:24,564 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:37:24,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:24,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 23:37:24,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:24,590 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-13 23:37:24,614 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 23:37:24,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 23:37:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:37:24,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927520291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:24,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894574108] [2024-11-13 23:37:24,688 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:37:24,688 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:24,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:24,688 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:24,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:25,039 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:25,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:26,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4935#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)) (= |ULTIMATE.start_loop_~node~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~l~0#1.base|) 1)))' at error location [2024-11-13 23:37:26,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:26,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:37:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2024-11-13 23:37:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870247783] [2024-11-13 23:37:26,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:26,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:37:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:37:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=446, Unknown=1, NotChecked=42, Total=552 [2024-11-13 23:37:26,107 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:26,358 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2024-11-13 23:37:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:37:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-11-13 23:37:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:26,359 INFO L225 Difference]: With dead ends: 58 [2024-11-13 23:37:26,360 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 23:37:26,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=74, Invalid=529, Unknown=1, NotChecked=46, Total=650 [2024-11-13 23:37:26,361 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:26,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2024-11-13 23:37:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 23:37:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-13 23:37:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 23:37:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-11-13 23:37:26,364 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 27 [2024-11-13 23:37:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:26,364 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-11-13 23:37:26,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-11-13 23:37:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 23:37:26,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:26,365 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:26,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 23:37:26,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 23:37:26,566 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:26,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1204133299, now seen corresponding path program 2 times [2024-11-13 23:37:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677870094] [2024-11-13 23:37:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:27,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677870094] [2024-11-13 23:37:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677870094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954882682] [2024-11-13 23:37:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:27,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:27,041 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:27,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 23:37:27,159 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:37:27,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:27,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 23:37:27,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:27,405 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-13 23:37:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:37:27,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:37:27,443 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:37:27,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:37:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-13 23:37:27,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954882682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748667757] [2024-11-13 23:37:27,724 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:37:27,724 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:27,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:27,725 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:27,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:28,110 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:28,123 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:29,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5192#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_main_~l~0#1.base|) 7) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)))' at error location [2024-11-13 23:37:29,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:29,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:37:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-13 23:37:29,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391447323] [2024-11-13 23:37:29,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:29,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 23:37:29,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 23:37:29,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1022, Unknown=1, NotChecked=64, Total=1190 [2024-11-13 23:37:29,215 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:37:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:29,786 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2024-11-13 23:37:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:37:29,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2024-11-13 23:37:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:29,788 INFO L225 Difference]: With dead ends: 67 [2024-11-13 23:37:29,788 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 23:37:29,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=1275, Unknown=1, NotChecked=72, Total=1482 [2024-11-13 23:37:29,790 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:29,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 259 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2024-11-13 23:37:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 23:37:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-13 23:37:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:37:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2024-11-13 23:37:29,796 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 27 [2024-11-13 23:37:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:29,796 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2024-11-13 23:37:29,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:37:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2024-11-13 23:37:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:37:29,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:29,797 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:29,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 23:37:30,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:30,001 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:30,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1825858890, now seen corresponding path program 3 times [2024-11-13 23:37:30,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:30,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116215513] [2024-11-13 23:37:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:30,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:30,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:30,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116215513] [2024-11-13 23:37:30,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116215513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:30,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891466747] [2024-11-13 23:37:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:37:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:30,611 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:30,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 23:37:30,729 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:37:30,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:30,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 23:37:30,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:30,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:37:30,815 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:37:30,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:37:30,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:37:30,900 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_172 Int)) (and (= 0 (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_172)) (= (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_172 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_172)) |c_#memory_$Pointer$.base|))) is different from true [2024-11-13 23:37:30,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:37:30,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:37:30,926 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:37:30,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:37:30,948 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-13 23:37:30,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-13 23:37:31,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-13 23:37:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-13 23:37:31,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:31,095 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-13 23:37:31,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 23:37:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891466747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683513927] [2024-11-13 23:37:31,238 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:37:31,238 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:31,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:31,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:31,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:31,648 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:31,664 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:33,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5485#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_99| Int)) (and (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_99| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))) (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_99|) 1)))))' at error location [2024-11-13 23:37:33,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:33,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:37:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 22 [2024-11-13 23:37:33,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028289551] [2024-11-13 23:37:33,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:33,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 23:37:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 23:37:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1225, Unknown=8, NotChecked=70, Total=1406 [2024-11-13 23:37:33,197 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:33,821 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-11-13 23:37:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 23:37:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-13 23:37:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:33,822 INFO L225 Difference]: With dead ends: 69 [2024-11-13 23:37:33,822 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 23:37:33,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=1433, Unknown=8, NotChecked=76, Total=1640 [2024-11-13 23:37:33,824 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:33,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 278 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 450 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2024-11-13 23:37:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 23:37:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-11-13 23:37:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 61 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:37:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2024-11-13 23:37:33,828 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 29 [2024-11-13 23:37:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:33,828 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2024-11-13 23:37:33,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:37:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2024-11-13 23:37:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:37:33,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:33,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 23:37:34,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:34,036 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:34,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1825858889, now seen corresponding path program 2 times [2024-11-13 23:37:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:34,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025113117] [2024-11-13 23:37:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:35,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025113117] [2024-11-13 23:37:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025113117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000751513] [2024-11-13 23:37:35,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:35,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:35,115 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:35,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 23:37:35,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:37:35,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:35,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-13 23:37:35,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:35,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:37:35,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:37:35,658 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:37:35,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:37:35,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:37:35,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:37:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:37:40,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2024-11-13 23:37:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:37:40,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 23:37:40,132 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-13 23:37:40,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-13 23:37:40,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:37:40,276 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-13 23:37:40,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2024-11-13 23:37:40,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-13 23:37:40,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-11-13 23:37:40,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 23:37:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:40,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:41,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000751513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:41,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959441337] [2024-11-13 23:37:41,514 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:37:41,514 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:41,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:41,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:41,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:41,919 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:41,931 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:49,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5794#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_106| Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_95| Int)) (and (or (not (= |v_ULTIMATE.start_loop_~node~0#1.offset_95| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_106| 0))) (or (< (select |#length| |v_ULTIMATE.start_loop_~node~0#1.base_106|) (+ |v_ULTIMATE.start_loop_~node~0#1.offset_95| 8)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_95| 0)))))' at error location [2024-11-13 23:37:49,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:49,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:37:49,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2024-11-13 23:37:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919384004] [2024-11-13 23:37:49,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:49,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 23:37:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 23:37:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2475, Unknown=5, NotChecked=0, Total=2652 [2024-11-13 23:37:49,952 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:37:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:51,460 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-11-13 23:37:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:37:51,461 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2024-11-13 23:37:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:51,462 INFO L225 Difference]: With dead ends: 69 [2024-11-13 23:37:51,462 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 23:37:51,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=239, Invalid=3416, Unknown=5, NotChecked=0, Total=3660 [2024-11-13 23:37:51,464 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:51,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 378 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 23:37:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 23:37:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-11-13 23:37:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.309090909090909) internal successors, (72), 61 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:37:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-11-13 23:37:51,468 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 29 [2024-11-13 23:37:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:51,468 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-11-13 23:37:51,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:37:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-11-13 23:37:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:37:51,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:51,469 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:51,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 23:37:51,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 23:37:51,670 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:37:51,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash -852626503, now seen corresponding path program 1 times [2024-11-13 23:37:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:51,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069867271] [2024-11-13 23:37:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:51,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:52,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069867271] [2024-11-13 23:37:52,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069867271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414888992] [2024-11-13 23:37:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:52,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:52,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:52,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:52,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 23:37:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:52,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 23:37:52,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:52,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:37:52,634 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:37:52,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:37:52,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:37:52,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:37:52,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2024-11-13 23:37:53,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-13 23:37:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:53,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:53,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:37:53,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2024-11-13 23:37:53,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-13 23:37:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:37:53,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2024-11-13 23:37:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414888992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761800379] [2024-11-13 23:37:53,676 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:37:53,676 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:53,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:53,677 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:53,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:54,137 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:37:54,148 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:12,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6133#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_49| Int)) (not (= (select |#valid| |v_ULTIMATE.start_destroy_~l#1.base_49|) 1))))' at error location [2024-11-13 23:38:12,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:12,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:38:12,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2024-11-13 23:38:12,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978522798] [2024-11-13 23:38:12,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:12,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 23:38:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 23:38:12,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2392, Unknown=8, NotChecked=0, Total=2550 [2024-11-13 23:38:12,619 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:38:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:16,104 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-13 23:38:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:38:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-13 23:38:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:16,106 INFO L225 Difference]: With dead ends: 75 [2024-11-13 23:38:16,106 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 23:38:16,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=220, Invalid=3554, Unknown=8, NotChecked=0, Total=3782 [2024-11-13 23:38:16,108 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:16,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 235 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 23:38:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 23:38:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-13 23:38:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 68 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:38:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2024-11-13 23:38:16,117 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 29 [2024-11-13 23:38:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:16,117 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2024-11-13 23:38:16,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:38:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2024-11-13 23:38:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:38:16,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:16,118 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:16,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 23:38:16,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:16,319 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:38:16,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash -852626502, now seen corresponding path program 1 times [2024-11-13 23:38:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:16,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674301577] [2024-11-13 23:38:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:38:16,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674301577] [2024-11-13 23:38:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674301577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99167082] [2024-11-13 23:38:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:16,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:16,777 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:16,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 23:38:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:16,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 23:38:16,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:17,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:38:17,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:38:17,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:38:17,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:17,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-13 23:38:17,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:17,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:38:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:17,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:18,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2024-11-13 23:38:18,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:18,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 131 [2024-11-13 23:38:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:38:19,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99167082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:19,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748965941] [2024-11-13 23:38:19,073 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:38:19,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:19,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:19,074 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:19,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:19,518 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:38:19,528 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:28,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6533#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:38:28,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:28,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:28,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2024-11-13 23:38:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174423842] [2024-11-13 23:38:28,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:28,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 23:38:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 23:38:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3223, Unknown=3, NotChecked=0, Total=3422 [2024-11-13 23:38:28,146 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 42 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 23:38:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:29,595 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2024-11-13 23:38:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:38:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2024-11-13 23:38:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:29,597 INFO L225 Difference]: With dead ends: 76 [2024-11-13 23:38:29,597 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 23:38:29,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=272, Invalid=4281, Unknown=3, NotChecked=0, Total=4556 [2024-11-13 23:38:29,599 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:29,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 328 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 23:38:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 23:38:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-13 23:38:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 69 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:38:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-13 23:38:29,603 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 29 [2024-11-13 23:38:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:29,603 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-13 23:38:29,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 37 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 23:38:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-13 23:38:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:38:29,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:29,604 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:29,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 23:38:29,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 23:38:29,805 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:38:29,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash -852625404, now seen corresponding path program 1 times [2024-11-13 23:38:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114042677] [2024-11-13 23:38:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:38:30,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:30,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114042677] [2024-11-13 23:38:30,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114042677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:30,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684835525] [2024-11-13 23:38:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:30,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:30,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:30,110 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:30,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 23:38:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:30,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:38:30,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:30,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:30,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-11-13 23:38:30,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:30,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-11-13 23:38:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:38:30,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:31,455 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-13 23:38:31,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2024-11-13 23:38:31,480 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-11-13 23:38:31,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 23:38:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:38:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684835525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037966097] [2024-11-13 23:38:31,704 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-13 23:38:31,704 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:31,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:31,705 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:31,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:32,150 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:38:32,167 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:36,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6920#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_12| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_12| |#valid|))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:38:36,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:36,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 32 [2024-11-13 23:38:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893081435] [2024-11-13 23:38:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:36,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 23:38:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 23:38:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2389, Unknown=1, NotChecked=0, Total=2550 [2024-11-13 23:38:36,684 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:38:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:38,191 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2024-11-13 23:38:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 23:38:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-13 23:38:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:38,192 INFO L225 Difference]: With dead ends: 85 [2024-11-13 23:38:38,192 INFO L226 Difference]: Without dead ends: 85 [2024-11-13 23:38:38,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=264, Invalid=4157, Unknown=1, NotChecked=0, Total=4422 [2024-11-13 23:38:38,194 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:38,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 334 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:38:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-13 23:38:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-11-13 23:38:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 71 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:38:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-11-13 23:38:38,200 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 29 [2024-11-13 23:38:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:38,200 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-11-13 23:38:38,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:38:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-11-13 23:38:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 23:38:38,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:38,201 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:38,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 23:38:38,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:38,402 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:38:38,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1991270560, now seen corresponding path program 4 times [2024-11-13 23:38:38,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253466306] [2024-11-13 23:38:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:38,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:38:39,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253466306] [2024-11-13 23:38:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253466306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83849180] [2024-11-13 23:38:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:38:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:39,372 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:39,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 23:38:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:39,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 23:38:39,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:39,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:38:39,878 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:38:39,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:38:39,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:38:39,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:38:40,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:38:40,290 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:38:40,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 23:38:40,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:38:40,328 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:38:40,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-11-13 23:38:40,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 23:38:40,390 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:38:40,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:38:40,567 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:38:40,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 60 [2024-11-13 23:38:40,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-13 23:38:40,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 23:38:41,003 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:38:41,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2024-11-13 23:38:41,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:38:41,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2024-11-13 23:38:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:38:41,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:41,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2024-11-13 23:38:42,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83849180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654646524] [2024-11-13 23:38:42,228 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:38:42,229 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:42,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:42,229 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:42,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:42,751 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:38:42,768 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:57,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7301#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_138| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_138|) 1)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_138| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))))))' at error location [2024-11-13 23:38:57,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:57,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:38:57,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2024-11-13 23:38:57,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364414508] [2024-11-13 23:38:57,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:57,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 23:38:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 23:38:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2694, Unknown=6, NotChecked=0, Total=2862 [2024-11-13 23:38:57,192 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:38:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:58,445 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-11-13 23:38:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:38:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2024-11-13 23:38:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:58,447 INFO L225 Difference]: With dead ends: 81 [2024-11-13 23:38:58,447 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 23:38:58,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=199, Invalid=3217, Unknown=6, NotChecked=0, Total=3422 [2024-11-13 23:38:58,448 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:58,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 346 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 23:38:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 23:38:58,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-11-13 23:38:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 73 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:38:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-11-13 23:38:58,453 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 31 [2024-11-13 23:38:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:58,453 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-11-13 23:38:58,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:38:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-11-13 23:38:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 23:38:58,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:58,454 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:58,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 23:38:58,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:58,654 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:38:58,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1991270561, now seen corresponding path program 3 times [2024-11-13 23:38:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476678760] [2024-11-13 23:38:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:38:59,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476678760] [2024-11-13 23:38:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476678760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611538485] [2024-11-13 23:38:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:38:59,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:59,870 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 23:39:00,003 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:39:00,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:00,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-13 23:39:00,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:00,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:39:00,364 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:39:00,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:39:00,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:39:00,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:39:00,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:39:00,905 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:39:00,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:39:00,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2024-11-13 23:39:00,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:39:01,059 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:39:01,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 54 [2024-11-13 23:39:01,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-13 23:39:01,558 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:39:01,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 27 [2024-11-13 23:39:01,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 23:39:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:39:01,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:02,564 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 293 treesize of output 255 [2024-11-13 23:39:03,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611538485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701228984] [2024-11-13 23:39:03,136 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:39:03,136 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:03,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:03,136 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:03,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:03,502 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:39:03,513 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:12,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7653#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.offset_134| Int) (|v_ULTIMATE.start_loop_~node~0#1.base_147| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_loop_~node~0#1.base_147|) (+ |v_ULTIMATE.start_loop_~node~0#1.offset_134| 8)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_134| 0)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.offset_134| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_147| 0))))))' at error location [2024-11-13 23:39:12,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:12,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:39:12,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2024-11-13 23:39:12,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378478357] [2024-11-13 23:39:12,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:12,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 23:39:12,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 23:39:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2807, Unknown=3, NotChecked=0, Total=2970 [2024-11-13 23:39:12,134 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:39:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:15,605 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2024-11-13 23:39:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:39:15,605 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2024-11-13 23:39:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:15,606 INFO L225 Difference]: With dead ends: 81 [2024-11-13 23:39:15,606 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 23:39:15,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=204, Invalid=3575, Unknown=3, NotChecked=0, Total=3782 [2024-11-13 23:39:15,607 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:15,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 496 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 23:39:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 23:39:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-11-13 23:39:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 73 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:39:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-13 23:39:15,612 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 31 [2024-11-13 23:39:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:15,612 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-13 23:39:15,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:39:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-13 23:39:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 23:39:15,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:15,613 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:39:15,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 23:39:15,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:15,813 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:39:15,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash 964713110, now seen corresponding path program 1 times [2024-11-13 23:39:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569337207] [2024-11-13 23:39:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:39:16,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:16,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569337207] [2024-11-13 23:39:16,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569337207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:16,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099803182] [2024-11-13 23:39:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:16,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:16,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:16,127 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:16,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 23:39:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:16,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 23:39:16,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:16,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:39:16,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:39:16,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-13 23:39:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:39:16,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:16,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-13 23:39:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:39:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099803182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:39:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110676551] [2024-11-13 23:39:17,212 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:39:17,212 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:17,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:17,212 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:17,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:17,690 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:39:17,707 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:24,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8048#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_65| Int)) (and (= |ULTIMATE.start_destroy_~next~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_destroy_~l#1.base_65|) 0)) (<= |#StackHeapBarrier| |v_ULTIMATE.start_destroy_~l#1.base_65|) (<= 8 (select |#length| |v_ULTIMATE.start_destroy_~l#1.base_65|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_destroy_~l#1.base_65|) 0) |ULTIMATE.start_destroy_~next~0#1.offset|) (= (select |#valid| |v_ULTIMATE.start_destroy_~l#1.base_65|) 1))))' at error location [2024-11-13 23:39:24,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:24,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:39:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 26 [2024-11-13 23:39:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998464367] [2024-11-13 23:39:24,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:24,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:39:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:39:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1844, Unknown=2, NotChecked=0, Total=1980 [2024-11-13 23:39:24,116 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 23:39:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:25,247 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2024-11-13 23:39:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:39:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-11-13 23:39:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:25,249 INFO L225 Difference]: With dead ends: 81 [2024-11-13 23:39:25,249 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 23:39:25,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=188, Invalid=2672, Unknown=2, NotChecked=0, Total=2862 [2024-11-13 23:39:25,250 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:25,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 283 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:39:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 23:39:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-13 23:39:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:39:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2024-11-13 23:39:25,259 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 31 [2024-11-13 23:39:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:25,260 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2024-11-13 23:39:25,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 23:39:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2024-11-13 23:39:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 23:39:25,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:25,260 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:39:25,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 23:39:25,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:25,461 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:39:25,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1944366070, now seen corresponding path program 5 times [2024-11-13 23:39:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:25,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066694097] [2024-11-13 23:39:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:39:26,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:26,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066694097] [2024-11-13 23:39:26,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066694097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:26,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878327114] [2024-11-13 23:39:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:39:26,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:26,606 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:26,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 23:39:26,755 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:39:26,755 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:26,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 23:39:26,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:26,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:39:27,045 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:39:27,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:39:27,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:39:27,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:39:27,457 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 23:39:27,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 23:39:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:39:27,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2024-11-13 23:39:27,500 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-13 23:39:27,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 23:39:27,617 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2024-11-13 23:39:27,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 81 [2024-11-13 23:39:27,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2024-11-13 23:39:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:39:28,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878327114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090062825] [2024-11-13 23:39:29,539 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:39:29,539 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:29,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:29,540 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:29,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:29,901 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:39:29,911 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:40,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8427#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_165| Int)) (and (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_165| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))) (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_165|) 1)))))' at error location [2024-11-13 23:39:40,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:40,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:39:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2024-11-13 23:39:40,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914540846] [2024-11-13 23:39:40,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:40,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 23:39:40,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 23:39:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2912, Unknown=3, NotChecked=0, Total=3080 [2024-11-13 23:39:40,400 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 38 states, 32 states have (on average 1.59375) internal successors, (51), 30 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:39:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:41,819 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2024-11-13 23:39:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:39:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.59375) internal successors, (51), 30 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2024-11-13 23:39:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:41,820 INFO L225 Difference]: With dead ends: 83 [2024-11-13 23:39:41,820 INFO L226 Difference]: Without dead ends: 83 [2024-11-13 23:39:41,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=194, Invalid=3343, Unknown=3, NotChecked=0, Total=3540 [2024-11-13 23:39:41,821 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:41,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 507 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 23:39:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-13 23:39:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2024-11-13 23:39:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 75 states have internal predecessors, (87), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:39:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-13 23:39:41,825 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 33 [2024-11-13 23:39:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:41,826 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-13 23:39:41,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.59375) internal successors, (51), 30 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:39:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-13 23:39:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 23:39:41,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:41,827 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:39:41,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 23:39:42,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:42,027 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:39:42,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 725126493, now seen corresponding path program 3 times [2024-11-13 23:39:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:42,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389853068] [2024-11-13 23:39:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:39:42,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389853068] [2024-11-13 23:39:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389853068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134129555] [2024-11-13 23:39:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:39:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:42,737 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:42,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 23:39:42,880 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:39:42,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:42,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 23:39:42,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:43,134 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-13 23:39:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:39:43,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:39:43,175 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 23:39:43,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 23:39:43,227 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-13 23:39:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:39:43,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:39:43,254 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:39:43,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:39:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2024-11-13 23:39:43,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134129555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252764481] [2024-11-13 23:39:43,543 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:39:43,543 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:43,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:43,543 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:43,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:43,899 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:39:43,909 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:45,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8767#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_main_~l~0#1.base|) 7) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)))' at error location [2024-11-13 23:39:45,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:45,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:39:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2024-11-13 23:39:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436927391] [2024-11-13 23:39:45,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:45,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:39:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:39:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1366, Unknown=2, NotChecked=150, Total=1640 [2024-11-13 23:39:45,385 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 27 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 23:39:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:46,133 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2024-11-13 23:39:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:39:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2024-11-13 23:39:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:46,134 INFO L225 Difference]: With dead ends: 82 [2024-11-13 23:39:46,134 INFO L226 Difference]: Without dead ends: 82 [2024-11-13 23:39:46,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=192, Invalid=1976, Unknown=2, NotChecked=182, Total=2352 [2024-11-13 23:39:46,135 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:46,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 311 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2024-11-13 23:39:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-13 23:39:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-13 23:39:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 75 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:39:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2024-11-13 23:39:46,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 35 [2024-11-13 23:39:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:46,138 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2024-11-13 23:39:46,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 23:39:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2024-11-13 23:39:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 23:39:46,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:46,139 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:39:46,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 23:39:46,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 23:39:46,339 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:39:46,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2142179471, now seen corresponding path program 2 times [2024-11-13 23:39:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340919662] [2024-11-13 23:39:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:39:46,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340919662] [2024-11-13 23:39:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340919662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124358673] [2024-11-13 23:39:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:39:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:46,681 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:46,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 23:39:46,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:39:46,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:46,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 23:39:46,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:46,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:39:47,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:39:47,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:39:47,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-13 23:39:48,066 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:39:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:39:48,103 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-13 23:39:48,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 46 [2024-11-13 23:39:48,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:39:48,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:39:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:39:48,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:48,671 INFO L349 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2024-11-13 23:39:48,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2024-11-13 23:39:49,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:39:49,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 135 [2024-11-13 23:39:50,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:39:50,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 217 treesize of output 422 [2024-11-13 23:39:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:39:50,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124358673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:39:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756879114] [2024-11-13 23:39:50,789 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:39:50,789 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:50,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:50,789 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:50,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:51,188 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:39:51,204 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:20,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9192#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_72| Int)) (not (= (select |#valid| |v_ULTIMATE.start_destroy_~l#1.base_72|) 1))))' at error location [2024-11-13 23:40:20,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:20,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:40:20,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 34 [2024-11-13 23:40:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264329140] [2024-11-13 23:40:20,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:20,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 23:40:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 23:40:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2494, Unknown=13, NotChecked=0, Total=2652 [2024-11-13 23:40:20,530 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:40:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:24,440 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2024-11-13 23:40:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 23:40:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-11-13 23:40:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:24,441 INFO L225 Difference]: With dead ends: 97 [2024-11-13 23:40:24,441 INFO L226 Difference]: Without dead ends: 97 [2024-11-13 23:40:24,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=256, Invalid=4561, Unknown=13, NotChecked=0, Total=4830 [2024-11-13 23:40:24,442 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:24,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 312 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 23:40:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-13 23:40:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2024-11-13 23:40:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 80 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:40:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2024-11-13 23:40:24,446 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 34 [2024-11-13 23:40:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:24,446 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2024-11-13 23:40:24,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:40:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2024-11-13 23:40:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 23:40:24,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:24,447 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:24,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 23:40:24,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 23:40:24,651 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:40:24,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2142180570, now seen corresponding path program 2 times [2024-11-13 23:40:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:24,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884813831] [2024-11-13 23:40:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:40:25,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884813831] [2024-11-13 23:40:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884813831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361449163] [2024-11-13 23:40:25,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:40:25,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:25,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:25,561 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:25,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 23:40:25,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:40:25,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:40:25,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-13 23:40:25,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:40:26,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:40:26,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:40:26,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-13 23:40:26,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 27 [2024-11-13 23:40:27,229 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~l#1.base_73| Int) (|v_ULTIMATE.start_destroy_~l#1.base_74| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_73| 1) |v_ULTIMATE.start_destroy_~l#1.base_74|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_73| 0) |v_ULTIMATE.start_destroy_~l#1.base_74| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_73|) 0))) is different from true [2024-11-13 23:40:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2024-11-13 23:40:27,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:27,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-13 23:40:28,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361449163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171683480] [2024-11-13 23:40:28,281 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-13 23:40:28,281 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:28,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:28,282 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:28,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:28,752 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:40:28,764 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:33,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9635#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_13| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_13| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:40:33,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:33,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:40:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2024-11-13 23:40:33,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052737884] [2024-11-13 23:40:33,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:33,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 23:40:33,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 23:40:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2804, Unknown=2, NotChecked=106, Total=3080 [2024-11-13 23:40:33,807 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 29 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:40:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:35,502 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2024-11-13 23:40:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 23:40:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-11-13 23:40:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:35,503 INFO L225 Difference]: With dead ends: 94 [2024-11-13 23:40:35,503 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 23:40:35,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=226, Invalid=3808, Unknown=2, NotChecked=124, Total=4160 [2024-11-13 23:40:35,504 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:35,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 204 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 56 Unchecked, 0.9s Time] [2024-11-13 23:40:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 23:40:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-13 23:40:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 69 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:40:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2024-11-13 23:40:35,508 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 34 [2024-11-13 23:40:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:35,508 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2024-11-13 23:40:35,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 23:40:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2024-11-13 23:40:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 23:40:35,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:35,509 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:35,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 23:40:35,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 23:40:35,709 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:40:35,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1027706710, now seen corresponding path program 3 times [2024-11-13 23:40:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913841871] [2024-11-13 23:40:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:40:36,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:36,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913841871] [2024-11-13 23:40:36,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913841871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:36,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418531124] [2024-11-13 23:40:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:40:36,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:36,475 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:36,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 23:40:36,630 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:40:36,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:40:36,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 23:40:36,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:40:36,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:40:36,743 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:40:36,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:40:36,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-13 23:40:36,874 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_289 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_289 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_289))) (= (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_289) 0))) is different from true [2024-11-13 23:40:36,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:40:36,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2024-11-13 23:40:36,893 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:40:36,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:40:36,963 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-13 23:40:36,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2024-11-13 23:40:37,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 23:40:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-13 23:40:37,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:37,167 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1381 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_1381) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) 0))) is different from false [2024-11-13 23:40:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418531124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708507110] [2024-11-13 23:40:37,279 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-13 23:40:37,279 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:37,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:37,279 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:37,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:37,714 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:40:37,725 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:40,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10019#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_14| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_14| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:40:40,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:40,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:40:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 25 [2024-11-13 23:40:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920101230] [2024-11-13 23:40:40,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:40,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 23:40:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 23:40:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1747, Unknown=4, NotChecked=170, Total=2070 [2024-11-13 23:40:40,078 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:40:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:40,726 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2024-11-13 23:40:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:40:40,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-11-13 23:40:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:40,727 INFO L225 Difference]: With dead ends: 77 [2024-11-13 23:40:40,727 INFO L226 Difference]: Without dead ends: 77 [2024-11-13 23:40:40,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=162, Invalid=1912, Unknown=4, NotChecked=178, Total=2256 [2024-11-13 23:40:40,728 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:40,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 432 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2024-11-13 23:40:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-13 23:40:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-13 23:40:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 69 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:40:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2024-11-13 23:40:40,733 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 35 [2024-11-13 23:40:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:40,733 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2024-11-13 23:40:40,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 23:40:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2024-11-13 23:40:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:40:40,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:40,734 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:40,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 23:40:40,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 23:40:40,934 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:40:40,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1061896646, now seen corresponding path program 6 times [2024-11-13 23:40:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:40,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385133941] [2024-11-13 23:40:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:40,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:40:42,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:42,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385133941] [2024-11-13 23:40:42,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385133941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:42,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633963286] [2024-11-13 23:40:42,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:40:42,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:42,379 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:42,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 23:40:42,541 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:40:42,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:40:42,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-13 23:40:42,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:40:42,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:40:42,648 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:40:42,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:40:42,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:40:42,893 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:40:42,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 23:40:42,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:40:42,943 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:40:42,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:40:43,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 23:40:43,265 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_301 Int)) (and (= (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_301 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_301)) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_301) 0) (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_~pi~0.base_301 1)))) is different from true [2024-11-13 23:40:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:40:43,300 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-13 23:40:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 47 [2024-11-13 23:40:43,387 INFO L349 Elim1Store]: treesize reduction 110, result has 32.1 percent of original size [2024-11-13 23:40:43,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 69 [2024-11-13 23:40:43,579 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2024-11-13 23:40:43,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 72 [2024-11-13 23:40:43,608 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 29 treesize of output 21 [2024-11-13 23:40:43,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 17 [2024-11-13 23:40:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2024-11-13 23:40:44,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633963286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263826966] [2024-11-13 23:40:44,387 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:40:44,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:44,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:44,388 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:44,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:44,862 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:40:44,874 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:50,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10368#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_200| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_200|) 1)) (or (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_200| 0))))))' at error location [2024-11-13 23:40:50,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:50,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:40:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 32 [2024-11-13 23:40:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565705305] [2024-11-13 23:40:50,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:50,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 23:40:50,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 23:40:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1996, Unknown=9, NotChecked=90, Total=2256 [2024-11-13 23:40:50,879 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 33 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:40:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:51,810 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2024-11-13 23:40:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 23:40:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2024-11-13 23:40:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:51,812 INFO L225 Difference]: With dead ends: 88 [2024-11-13 23:40:51,812 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 23:40:51,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=179, Invalid=2266, Unknown=9, NotChecked=96, Total=2550 [2024-11-13 23:40:51,813 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:51,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 334 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 571 Invalid, 0 Unknown, 66 Unchecked, 0.7s Time] [2024-11-13 23:40:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 23:40:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-13 23:40:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 78 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:40:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2024-11-13 23:40:51,817 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 37 [2024-11-13 23:40:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:51,817 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2024-11-13 23:40:51,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:40:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2024-11-13 23:40:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:40:51,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:51,818 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:51,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 23:40:52,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:52,019 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:40:52,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1061896647, now seen corresponding path program 4 times [2024-11-13 23:40:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160722652] [2024-11-13 23:40:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:40:53,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:53,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160722652] [2024-11-13 23:40:53,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160722652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:53,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632500229] [2024-11-13 23:40:53,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:40:53,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:53,784 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:53,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 23:40:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:53,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-13 23:40:53,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:40:53,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:40:54,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:40:54,244 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:40:54,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:40:54,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:40:54,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:40:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:40:54,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2024-11-13 23:40:54,867 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-13 23:40:54,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-13 23:40:54,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 23:40:54,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:40:55,037 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:40:55,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 23:40:55,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:40:55,086 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:40:55,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2024-11-13 23:40:55,480 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_313 Int)) (and (= (store |c_old(#length)| v_alloc_and_zero_~pi~0.base_313 (select |c_#length| v_alloc_and_zero_~pi~0.base_313)) |c_#length|) (= (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_313) 0) (= (store |c_old(#memory_$Pointer$.offset)| v_alloc_and_zero_~pi~0.base_313 (select |c_#memory_$Pointer$.offset| v_alloc_and_zero_~pi~0.base_313)) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_313 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_313))))) is different from true [2024-11-13 23:40:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:40:55,509 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-13 23:40:55,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 62 [2024-11-13 23:40:55,556 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-13 23:40:55,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2024-11-13 23:40:55,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 23:40:55,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:40:55,739 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-13 23:40:55,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 69 [2024-11-13 23:40:55,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2024-11-13 23:40:56,114 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 23:40:56,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2024-11-13 23:40:56,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-11-13 23:40:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2024-11-13 23:40:56,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:56,564 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1555 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_1555) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) (forall ((v_ArrVal_1556 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) is different from false [2024-11-13 23:40:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632500229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074259823] [2024-11-13 23:40:56,886 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:40:56,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:56,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:56,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:56,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:57,377 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:40:57,393 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:08,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10744#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.offset_187| Int) (|v_ULTIMATE.start_loop_~node~0#1.base_207| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_loop_~node~0#1.base_207|) (+ |v_ULTIMATE.start_loop_~node~0#1.offset_187| 8)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_187| 0)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.offset_187| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_207| 0))))))' at error location [2024-11-13 23:41:08,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:08,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:41:08,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 38 [2024-11-13 23:41:08,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037555053] [2024-11-13 23:41:08,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:08,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 23:41:08,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:08,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 23:41:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2774, Unknown=5, NotChecked=214, Total=3192 [2024-11-13 23:41:08,497 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 39 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 23:41:11,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:41:13,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 23:41:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:41:14,406 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-11-13 23:41:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:41:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37 [2024-11-13 23:41:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:41:14,407 INFO L225 Difference]: With dead ends: 87 [2024-11-13 23:41:14,407 INFO L226 Difference]: Without dead ends: 87 [2024-11-13 23:41:14,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=268, Invalid=3641, Unknown=5, NotChecked=246, Total=4160 [2024-11-13 23:41:14,408 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:41:14,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 364 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 691 Invalid, 2 Unknown, 60 Unchecked, 5.2s Time] [2024-11-13 23:41:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-13 23:41:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-11-13 23:41:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 78 states have internal predecessors, (93), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:41:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2024-11-13 23:41:14,412 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 37 [2024-11-13 23:41:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:41:14,412 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2024-11-13 23:41:14,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 23:41:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2024-11-13 23:41:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:41:14,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:41:14,414 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:41:14,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 23:41:14,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:14,614 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:41:14,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:41:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2035129033, now seen corresponding path program 3 times [2024-11-13 23:41:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:41:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725591637] [2024-11-13 23:41:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:41:14,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:41:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:41:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:41:15,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:41:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725591637] [2024-11-13 23:41:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725591637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:41:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062015796] [2024-11-13 23:41:15,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:41:15,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:15,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:41:15,730 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:41:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 23:41:15,901 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:41:15,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:41:15,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 23:41:15,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:41:15,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:41:16,153 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:41:16,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:41:16,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:41:16,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:41:16,768 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:41:16,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 23:41:16,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:41:16,802 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 23:41:16,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-11-13 23:41:16,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 23:41:16,843 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:41:16,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:41:16,964 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:41:16,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 50 [2024-11-13 23:41:16,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-13 23:41:17,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 23:41:17,397 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 23:41:17,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 19 [2024-11-13 23:41:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:41:17,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:41:18,261 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1626 (Array Int Int)) (v_ArrVal_1632 (Array Int Int)) (v_ArrVal_1631 (Array Int Int)) (|v_ULTIMATE.start_loop_~node~0#1.offset_190| Int) (|v_ULTIMATE.start_create_#t~ret6#1.base_214| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret6#1.base_214|) 0)) (< (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_create_#t~ret6#1.base_214| v_ArrVal_1632) |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_1626) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_190|) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~ret6#1.base_214| v_ArrVal_1631))) (store .cse1 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| |v_ULTIMATE.start_create_#t~ret6#1.base_214|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_190|) 0)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_190| 0) (= |v_ULTIMATE.start_create_#t~ret6#1.base_214| 0))) is different from false [2024-11-13 23:41:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062015796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:41:18,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322002028] [2024-11-13 23:41:18,265 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:41:18,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:41:18,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:41:18,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:41:18,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:41:18,702 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:41:18,725 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:37,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11150#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.base_89| Int)) (not (= (select |#valid| |v_ULTIMATE.start_destroy_~l#1.base_89|) 1))))' at error location [2024-11-13 23:41:37,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:37,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:41:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 36 [2024-11-13 23:41:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659330669] [2024-11-13 23:41:37,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:37,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 23:41:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 23:41:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3221, Unknown=10, NotChecked=114, Total=3540 [2024-11-13 23:41:37,788 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 36 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 23:41:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:41:39,527 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2024-11-13 23:41:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 23:41:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2024-11-13 23:41:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:41:39,529 INFO L225 Difference]: With dead ends: 93 [2024-11-13 23:41:39,529 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 23:41:39,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=243, Invalid=4173, Unknown=10, NotChecked=130, Total=4556 [2024-11-13 23:41:39,530 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:41:39,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 306 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 23:41:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 23:41:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-13 23:41:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 85 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:41:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2024-11-13 23:41:39,536 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 37 [2024-11-13 23:41:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:41:39,537 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2024-11-13 23:41:39,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 23:41:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2024-11-13 23:41:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:41:39,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:41:39,538 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:41:39,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 23:41:39,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:39,739 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:41:39,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:41:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1719499856, now seen corresponding path program 7 times [2024-11-13 23:41:39,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:41:39,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3660277] [2024-11-13 23:41:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:41:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:41:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:41:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:41:41,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:41:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3660277] [2024-11-13 23:41:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3660277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:41:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672880025] [2024-11-13 23:41:41,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:41:41,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:41,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:41:41,658 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:41:41,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 23:41:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:41:41,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-13 23:41:41,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:41:41,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:41:42,207 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:41:42,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:41:42,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:41:42,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:41:42,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:41:42,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-13 23:41:42,859 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-13 23:41:42,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-13 23:41:42,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:41:43,035 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 23:41:43,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2024-11-13 23:41:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:41:43,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:41:43,447 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_334 Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| v_alloc_and_zero_~pi~0.base_334 (select |c_#memory_$Pointer$.offset| v_alloc_and_zero_~pi~0.base_334))) (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_~pi~0.base_334 1)) (= (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_334) 0) (= (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_334 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_334)) |c_#memory_$Pointer$.base|))) is different from true [2024-11-13 23:41:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:41:43,482 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-13 23:41:43,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 55 [2024-11-13 23:41:43,588 INFO L349 Elim1Store]: treesize reduction 90, result has 36.6 percent of original size [2024-11-13 23:41:43,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 69 [2024-11-13 23:41:43,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:41:43,862 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-13 23:41:43,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 88 [2024-11-13 23:41:43,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2024-11-13 23:41:44,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-11-13 23:41:44,804 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 23:41:44,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 37 [2024-11-13 23:41:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2024-11-13 23:41:45,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:41:46,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672880025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:41:46,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95424088] [2024-11-13 23:41:46,065 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:41:46,065 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:41:46,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:41:46,065 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:41:46,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:41:46,448 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:41:46,463 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:57,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11567#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~node~0#1.base_226| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_loop_~node~0#1.base_226|) 1)) (or (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.base_226| 0))))))' at error location [2024-11-13 23:41:57,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:57,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:41:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 41 [2024-11-13 23:41:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38104248] [2024-11-13 23:41:57,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:57,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 23:41:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 23:41:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3206, Unknown=12, NotChecked=114, Total=3540 [2024-11-13 23:41:57,446 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 42 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 23:41:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:41:59,096 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-11-13 23:41:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 23:41:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2024-11-13 23:41:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:41:59,097 INFO L225 Difference]: With dead ends: 97 [2024-11-13 23:41:59,097 INFO L226 Difference]: Without dead ends: 97 [2024-11-13 23:41:59,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=249, Invalid=3775, Unknown=12, NotChecked=124, Total=4160 [2024-11-13 23:41:59,098 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:41:59,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 361 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 669 Invalid, 0 Unknown, 71 Unchecked, 1.2s Time] [2024-11-13 23:41:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-13 23:41:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-11-13 23:41:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 87 states have internal predecessors, (104), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:41:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2024-11-13 23:41:59,103 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 39 [2024-11-13 23:41:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:41:59,103 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2024-11-13 23:41:59,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 23:41:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2024-11-13 23:41:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:41:59,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:41:59,104 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:41:59,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 23:41:59,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:59,305 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:41:59,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:41:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1719499855, now seen corresponding path program 5 times [2024-11-13 23:41:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:41:59,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828855431] [2024-11-13 23:41:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:41:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:41:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:42:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:42:02,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:42:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828855431] [2024-11-13 23:42:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828855431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579674497] [2024-11-13 23:42:02,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:42:02,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:42:02,081 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:42:02,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 23:42:02,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:42:02,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:42:02,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-13 23:42:02,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:42:02,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:42:02,811 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:42:02,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:42:02,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:42:02,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:42:03,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:42:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:03,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-13 23:42:03,822 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-13 23:42:03,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-13 23:42:03,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:42:04,071 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 23:42:04,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 23:42:04,126 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2024-11-13 23:42:04,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2024-11-13 23:42:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,151 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-13 23:42:11,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 74 [2024-11-13 23:42:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-11-13 23:42:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-13 23:42:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,290 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-13 23:42:11,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2024-11-13 23:42:11,614 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-13 23:42:11,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 87 [2024-11-13 23:42:11,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:11,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2024-11-13 23:42:12,778 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:42:12,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 46 [2024-11-13 23:42:12,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-13 23:42:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:42:12,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:42:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579674497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234217701] [2024-11-13 23:42:15,597 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-13 23:42:15,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:42:15,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:42:15,597 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:42:15,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:42:16,010 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:42:16,024 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:42:24,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11986#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_loop_~node~0#1.offset_211| Int) (|v_ULTIMATE.start_loop_~node~0#1.base_235| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_loop_~node~0#1.base_235|) (+ |v_ULTIMATE.start_loop_~node~0#1.offset_211| 8)) (< |v_ULTIMATE.start_loop_~node~0#1.offset_211| 0)) (or (not (= |v_ULTIMATE.start_loop_~node~0#1.base_235| 0)) (not (= |v_ULTIMATE.start_loop_~node~0#1.offset_211| 0))))) (= |ULTIMATE.start_main_~l~0#1.offset| 0))' at error location [2024-11-13 23:42:24,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:42:24,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:42:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2024-11-13 23:42:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332032123] [2024-11-13 23:42:24,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:42:24,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 23:42:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:42:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 23:42:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4208, Unknown=4, NotChecked=0, Total=4422 [2024-11-13 23:42:24,233 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 48 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 23:42:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:42:29,295 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2024-11-13 23:42:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 23:42:29,296 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-13 23:42:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:42:29,296 INFO L225 Difference]: With dead ends: 96 [2024-11-13 23:42:29,296 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 23:42:29,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=318, Invalid=5998, Unknown=4, NotChecked=0, Total=6320 [2024-11-13 23:42:29,298 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:42:29,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 573 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 23:42:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 23:42:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-11-13 23:42:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.271604938271605) internal successors, (103), 87 states have internal predecessors, (103), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:42:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2024-11-13 23:42:29,302 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 39 [2024-11-13 23:42:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:42:29,303 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2024-11-13 23:42:29,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 23:42:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2024-11-13 23:42:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:42:29,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:42:29,304 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:42:29,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 23:42:29,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:29,505 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:42:29,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:42:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -926230860, now seen corresponding path program 2 times [2024-11-13 23:42:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:42:29,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375882633] [2024-11-13 23:42:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:42:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:42:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:42:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 23:42:29,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:42:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375882633] [2024-11-13 23:42:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375882633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555406454] [2024-11-13 23:42:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:42:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:42:29,954 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:42:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 23:42:30,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:42:30,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:42:30,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-13 23:42:30,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:42:30,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:42:30,630 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:42:30,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:42:30,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:42:30,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:42:31,327 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_357 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| v_alloc_and_zero_~pi~0.base_357 (select |c_#memory_$Pointer$.base| v_alloc_and_zero_~pi~0.base_357))) (= (store |c_old(#memory_$Pointer$.offset)| v_alloc_and_zero_~pi~0.base_357 (select |c_#memory_$Pointer$.offset| v_alloc_and_zero_~pi~0.base_357)) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_357) 0))) is different from true [2024-11-13 23:42:31,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:31,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2024-11-13 23:42:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:31,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-13 23:42:31,396 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:42:31,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:42:31,534 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-13 23:42:31,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2024-11-13 23:42:31,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2024-11-13 23:42:32,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:42:32,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2024-11-13 23:42:32,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:42:32,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2024-11-13 23:42:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2024-11-13 23:42:32,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:42:33,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:42:33,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 60 [2024-11-13 23:42:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555406454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499668203] [2024-11-13 23:42:34,712 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:42:34,712 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:42:34,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:42:34,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:42:34,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:42:35,381 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:42:35,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:42:43,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12422#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:42:43,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:42:43,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:42:43,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21] total 25 [2024-11-13 23:42:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925697849] [2024-11-13 23:42:43,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:42:43,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 23:42:43,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:42:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 23:42:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2114, Unknown=5, NotChecked=92, Total=2352 [2024-11-13 23:42:43,014 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 23:42:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:42:45,829 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2024-11-13 23:42:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 23:42:45,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2024-11-13 23:42:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:42:45,830 INFO L225 Difference]: With dead ends: 98 [2024-11-13 23:42:45,830 INFO L226 Difference]: Without dead ends: 98 [2024-11-13 23:42:45,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=197, Invalid=2994, Unknown=5, NotChecked=110, Total=3306 [2024-11-13 23:42:45,831 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:42:45,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 300 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 711 Invalid, 0 Unknown, 72 Unchecked, 1.7s Time] [2024-11-13 23:42:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-13 23:42:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-13 23:42:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 88 states have internal predecessors, (103), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:42:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-11-13 23:42:45,837 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 39 [2024-11-13 23:42:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:42:45,837 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-11-13 23:42:45,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 23:42:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-11-13 23:42:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:42:45,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:42:45,840 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:42:45,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 23:42:46,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:46,041 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:42:46,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:42:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1351615312, now seen corresponding path program 1 times [2024-11-13 23:42:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:42:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901631505] [2024-11-13 23:42:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:42:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:42:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:42:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:42:47,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:42:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901631505] [2024-11-13 23:42:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901631505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770250714] [2024-11-13 23:42:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:42:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:42:47,316 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:42:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 23:42:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:42:47,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-13 23:42:47,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:42:47,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:42:48,108 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:42:48,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:42:48,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:42:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:42:48,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 23:42:48,582 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_~pi~0.base_368 Int)) (and (= 0 (select |c_old(#valid)| v_alloc_and_zero_~pi~0.base_368)) (= (store |c_old(#memory_$Pointer$.offset)| v_alloc_and_zero_~pi~0.base_368 (select |c_#memory_$Pointer$.offset| v_alloc_and_zero_~pi~0.base_368)) |c_#memory_$Pointer$.offset|))) is different from true [2024-11-13 23:42:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:42:48,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:42:48,620 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 23:42:48,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 23:42:48,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:42:49,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:42:49,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 23:42:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2024-11-13 23:42:49,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:42:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770250714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:51,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695394000] [2024-11-13 23:42:51,319 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:42:51,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:42:51,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:42:51,319 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:42:51,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:42:51,884 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2024-11-13 23:42:51,899 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:42:58,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12876#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_destroy_~l#1.offset_109| Int)) (and (<= (+ 8 |v_ULTIMATE.start_destroy_~l#1.offset_109|) (select |#length| |ULTIMATE.start_destroy_~l#1.base|)) (not (= |v_ULTIMATE.start_destroy_~l#1.offset_109| 0)) (<= 0 |v_ULTIMATE.start_destroy_~l#1.offset_109|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) |v_ULTIMATE.start_destroy_~l#1.offset_109|) |ULTIMATE.start_destroy_~next~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) |v_ULTIMATE.start_destroy_~l#1.offset_109|) |ULTIMATE.start_destroy_~next~0#1.offset|))) (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1))' at error location [2024-11-13 23:42:58,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:42:58,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:42:58,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2024-11-13 23:42:58,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983671728] [2024-11-13 23:42:58,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:42:58,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-13 23:42:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:42:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-13 23:42:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3584, Unknown=3, NotChecked=120, Total=3906 [2024-11-13 23:42:58,603 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 40 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:43:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:03,586 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2024-11-13 23:43:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 23:43:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-11-13 23:43:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:03,588 INFO L225 Difference]: With dead ends: 97 [2024-11-13 23:43:03,588 INFO L226 Difference]: Without dead ends: 97 [2024-11-13 23:43:03,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=290, Invalid=5113, Unknown=3, NotChecked=144, Total=5550 [2024-11-13 23:43:03,589 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:03,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 362 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 730 Invalid, 0 Unknown, 60 Unchecked, 1.4s Time] [2024-11-13 23:43:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-13 23:43:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-13 23:43:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 89 states have internal predecessors, (104), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 23:43:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2024-11-13 23:43:03,593 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2024-11-13 23:43:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:03,593 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2024-11-13 23:43:03,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 23:43:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2024-11-13 23:43:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:43:03,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:03,594 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:43:03,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 23:43:03,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 23:43:03,795 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-13 23:43:03,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:03,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1123087130, now seen corresponding path program 8 times [2024-11-13 23:43:03,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:03,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422191103] [2024-11-13 23:43:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:43:06,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422191103] [2024-11-13 23:43:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422191103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205139578] [2024-11-13 23:43:06,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:43:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:06,284 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b762f45-79fa-4437-ba4c-c725b9aef4b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 23:43:06,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:43:06,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:06,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-13 23:43:06,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:06,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 23:43:07,408 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 23:43:07,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 23:43:07,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:43:07,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:43:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:08,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-13 23:43:08,510 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-13 23:43:08,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-13 23:43:08,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 23:43:08,787 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-13 23:43:08,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 23:43:08,859 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2024-11-13 23:43:08,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2024-11-13 23:43:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:09,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:09,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2024-11-13 23:43:09,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:09,940 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-13 23:43:09,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 51 [2024-11-13 23:43:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:10,051 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-13 23:43:10,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-13 23:43:10,398 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2024-11-13 23:43:10,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 96 [2024-11-13 23:43:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:43:10,455 INFO L349 Elim1Store]: treesize reduction 53, result has 43.6 percent of original size [2024-11-13 23:43:10,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 71 [2024-11-13 23:43:12,101 INFO L349 Elim1Store]: treesize reduction 64, result has 71.0 percent of original size [2024-11-13 23:43:12,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 221 treesize of output 333