./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/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_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:57:00,455 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:57:00,575 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 02:57:00,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:57:00,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:57:00,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:57:00,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:57:00,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:57:00,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:57:00,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:57:00,616 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:57:00,616 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:57:00,616 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:57:00,616 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:57:00,617 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:57:00,617 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:57:00,617 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:57:00,617 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:57:00,617 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:57:00,617 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:57:00,618 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:57:00,618 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:57:00,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 02:57:00,618 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 02:57:00,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:57:00,619 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:57:00,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:57:00,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:57:00,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:57:00,620 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:57:00,621 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 02:57:00,621 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:57:00,621 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:57:00,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:57:00,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:57:00,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:57:00,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:57:00,625 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:57:00,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:57:00,625 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:57:00,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:57:00,626 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:57:00,626 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:57:00,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:57:00,626 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_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2024-11-14 02:57:01,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:57:01,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:57:01,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:57:01,059 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:57:01,060 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:57:01,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i Unable to find full path for "g++" [2024-11-14 02:57:03,215 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:57:03,584 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:57:03,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2024-11-14 02:57:03,597 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/data/3afd8250a/fe93eb59b7b046b2b3b2654b059677d9/FLAG277589a73 [2024-11-14 02:57:03,613 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/data/3afd8250a/fe93eb59b7b046b2b3b2654b059677d9 [2024-11-14 02:57:03,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:57:03,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:57:03,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:57:03,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:57:03,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:57:03,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:57:03" (1/1) ... [2024-11-14 02:57:03,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d539154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:03, skipping insertion in model container [2024-11-14 02:57:03,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:57:03" (1/1) ... [2024-11-14 02:57:03,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:57:04,093 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 02:57:04,094 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 02:57:04,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:57:04,123 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:57:04,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:57:04,225 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:57:04,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04 WrapperNode [2024-11-14 02:57:04,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:57:04,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:57:04,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:57:04,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:57:04,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,292 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-11-14 02:57:04,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:57:04,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:57:04,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:57:04,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:57:04,308 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,330 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:57:04,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:57:04,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:57:04,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:57:04,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (1/1) ... [2024-11-14 02:57:04,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:57:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:04,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:57:04,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:57:04,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:57:04,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:57:04,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:57:04,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:57:04,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:57:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:57:04,623 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:57:04,625 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:57:04,904 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-14 02:57:04,904 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:57:05,003 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:57:05,003 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 02:57:05,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:57:05 BoogieIcfgContainer [2024-11-14 02:57:05,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:57:05,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:57:05,012 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:57:05,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:57:05,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:57:03" (1/3) ... [2024-11-14 02:57:05,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a39a30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:57:05, skipping insertion in model container [2024-11-14 02:57:05,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:57:04" (2/3) ... [2024-11-14 02:57:05,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a39a30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:57:05, skipping insertion in model container [2024-11-14 02:57:05,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:57:05" (3/3) ... [2024-11-14 02:57:05,023 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2024-11-14 02:57:05,043 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:57:05,046 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrncat-alloca-2.i that has 1 procedures, 37 locations, 1 initial locations, 4 loop locations, and 17 error locations. [2024-11-14 02:57:05,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:57:05,124 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;@54bc4713, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:57:05,124 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-14 02:57:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:57:05,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:05,136 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:57:05,137 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:05,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash 159393, now seen corresponding path program 1 times [2024-11-14 02:57:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138835188] [2024-11-14 02:57:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:05,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138835188] [2024-11-14 02:57:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138835188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:05,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:05,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:57:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92909321] [2024-11-14 02:57:05,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:05,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:57:05,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:57:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:05,487 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:05,607 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-14 02:57:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:57:05,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 02:57:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:05,624 INFO L225 Difference]: With dead ends: 38 [2024-11-14 02:57:05,624 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:57:05,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:05,631 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:05,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:57:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 02:57:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-14 02:57:05,679 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2024-11-14 02:57:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:05,681 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-14 02:57:05,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-14 02:57:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 02:57:05,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:05,682 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 02:57:05,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:57:05,683 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:05,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 4940598, now seen corresponding path program 1 times [2024-11-14 02:57:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526420706] [2024-11-14 02:57:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:05,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526420706] [2024-11-14 02:57:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526420706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:57:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58516880] [2024-11-14 02:57:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:05,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:57:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:57:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:05,947 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:06,024 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-14 02:57:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:57:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 02:57:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:06,025 INFO L225 Difference]: With dead ends: 34 [2024-11-14 02:57:06,025 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:57:06,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:06,027 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:06,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:57:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:57:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-14 02:57:06,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 4 [2024-11-14 02:57:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:06,032 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-14 02:57:06,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-14 02:57:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 02:57:06,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:06,032 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 02:57:06,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:57:06,033 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:06,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:06,033 INFO L85 PathProgramCache]: Analyzing trace with hash 4940599, now seen corresponding path program 1 times [2024-11-14 02:57:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188873942] [2024-11-14 02:57:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:06,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188873942] [2024-11-14 02:57:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188873942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:06,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:57:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347198381] [2024-11-14 02:57:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:06,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:06,609 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:06,783 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-14 02:57:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 02:57:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:06,786 INFO L225 Difference]: With dead ends: 36 [2024-11-14 02:57:06,786 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:57:06,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:57:06,787 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:06,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:57:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 02:57:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 2.0) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-14 02:57:06,801 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 4 [2024-11-14 02:57:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:06,801 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-14 02:57:06,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-14 02:57:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:57:06,802 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:06,803 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 02:57:06,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:57:06,803 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:06,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 153251279, now seen corresponding path program 1 times [2024-11-14 02:57:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027239697] [2024-11-14 02:57:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:06,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:06,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027239697] [2024-11-14 02:57:06,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027239697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:06,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:06,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:57:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676785403] [2024-11-14 02:57:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:06,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:57:06,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:57:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:06,898 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:06,993 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-11-14 02:57:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:57:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 02:57:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:06,995 INFO L225 Difference]: With dead ends: 34 [2024-11-14 02:57:06,996 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:57:06,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:57:06,998 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:07,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:57:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:57:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-14 02:57:07,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 5 [2024-11-14 02:57:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:07,009 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-14 02:57:07,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-14 02:57:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:57:07,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:07,010 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 02:57:07,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:57:07,010 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:07,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash 153251280, now seen corresponding path program 1 times [2024-11-14 02:57:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:07,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709775422] [2024-11-14 02:57:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:07,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709775422] [2024-11-14 02:57:07,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709775422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:07,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:07,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:57:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394875272] [2024-11-14 02:57:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:07,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:07,194 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:07,323 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-11-14 02:57:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 02:57:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:07,325 INFO L225 Difference]: With dead ends: 35 [2024-11-14 02:57:07,325 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 02:57:07,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:57:07,327 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:07,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 02:57:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-14 02:57:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-14 02:57:07,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 5 [2024-11-14 02:57:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:07,334 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-14 02:57:07,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-14 02:57:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:57:07,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:07,335 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 02:57:07,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:57:07,336 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:07,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 153253675, now seen corresponding path program 1 times [2024-11-14 02:57:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18615880] [2024-11-14 02:57:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:07,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:07,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:07,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18615880] [2024-11-14 02:57:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18615880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:07,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:57:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422747738] [2024-11-14 02:57:07,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:07,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:07,636 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:07,707 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-14 02:57:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 02:57:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:07,709 INFO L225 Difference]: With dead ends: 35 [2024-11-14 02:57:07,709 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:57:07,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:07,710 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:07,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:57:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:57:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-14 02:57:07,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 5 [2024-11-14 02:57:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:07,715 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-14 02:57:07,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-14 02:57:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:57:07,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:07,716 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 02:57:07,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 02:57:07,716 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:07,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash 453030126, now seen corresponding path program 1 times [2024-11-14 02:57:07,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:07,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871808995] [2024-11-14 02:57:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:08,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871808995] [2024-11-14 02:57:08,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871808995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858738394] [2024-11-14 02:57:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:08,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:57:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:08,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 02:57:08,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:08,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:57:08,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-14 02:57:08,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:08,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:57:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858738394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020301071] [2024-11-14 02:57:09,040 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 02:57:09,040 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:09,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:09,052 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:09,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:10,696 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:11,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(exists ((|v_ULTIMATE.start_main_~nondetString1~0#1.base_28| Int) (|v_ULTIMATE.start_main_~i~0#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.offset_26| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_28|) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_26| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_28|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_~length1~0#1|)))' at error location [2024-11-14 02:57:11,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:11,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:11,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 13 [2024-11-14 02:57:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358387576] [2024-11-14 02:57:11,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:11,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 02:57:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 02:57:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:57:11,370 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:11,761 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-14 02:57:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:57:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 02:57:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:11,762 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:57:11,762 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 02:57:11,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:57:11,763 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:11,764 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:57:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 02:57:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-14 02:57:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.85) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-14 02:57:11,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 6 [2024-11-14 02:57:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:11,774 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-14 02:57:11,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-14 02:57:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:57:11,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:11,775 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:11,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:57:11,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:11,977 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:11,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1159124729, now seen corresponding path program 1 times [2024-11-14 02:57:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996091248] [2024-11-14 02:57:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:12,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996091248] [2024-11-14 02:57:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996091248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811782450] [2024-11-14 02:57:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:12,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:12,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:57:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:12,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:57:12,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:12,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811782450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75126662] [2024-11-14 02:57:12,576 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:57:12,576 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:12,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:12,577 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:12,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:13,491 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:14,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) 0))))' at error location [2024-11-14 02:57:14,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:14,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:14,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-14 02:57:14,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357454721] [2024-11-14 02:57:14,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:14,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 02:57:14,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 02:57:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-14 02:57:14,021 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:14,285 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-11-14 02:57:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 02:57:14,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:57:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:14,287 INFO L225 Difference]: With dead ends: 37 [2024-11-14 02:57:14,287 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 02:57:14,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-14 02:57:14,288 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:14,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 132 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 02:57:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-14 02:57:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-14 02:57:14,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2024-11-14 02:57:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:14,296 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-14 02:57:14,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-14 02:57:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:57:14,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:14,301 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:14,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:57:14,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:14,502 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:14,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1159127124, now seen corresponding path program 1 times [2024-11-14 02:57:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:14,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086404679] [2024-11-14 02:57:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:15,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086404679] [2024-11-14 02:57:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086404679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784810514] [2024-11-14 02:57:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:15,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:15,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:15,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:57:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:15,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:57:15,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:15,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:57:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784810514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:15,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:57:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-14 02:57:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232066497] [2024-11-14 02:57:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:15,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:57:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:57:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:57:15,498 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:15,638 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-11-14 02:57:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:57:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:15,639 INFO L225 Difference]: With dead ends: 34 [2024-11-14 02:57:15,639 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:57:15,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:57:15,640 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:15,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:57:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 02:57:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-14 02:57:15,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 7 [2024-11-14 02:57:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:15,645 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-14 02:57:15,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-14 02:57:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:57:15,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:15,646 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:15,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:15,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:15,847 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:15,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1573202477, now seen corresponding path program 1 times [2024-11-14 02:57:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367142698] [2024-11-14 02:57:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:15,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:16,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367142698] [2024-11-14 02:57:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367142698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756961116] [2024-11-14 02:57:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:16,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:16,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:16,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:57:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:16,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 02:57:16,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:16,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 02:57:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:16,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756961116] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:57:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 10 [2024-11-14 02:57:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249824286] [2024-11-14 02:57:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:16,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:57:16,806 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:16,946 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-14 02:57:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:57:16,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:57:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:16,947 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:57:16,947 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 02:57:16,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:57:16,951 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:16,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 02:57:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-14 02:57:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-14 02:57:16,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2024-11-14 02:57:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:16,959 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-14 02:57:16,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-14 02:57:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 02:57:16,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:16,960 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-14 02:57:16,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:57:17,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 02:57:17,162 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:17,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1435867618, now seen corresponding path program 2 times [2024-11-14 02:57:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:17,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074071928] [2024-11-14 02:57:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:17,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:17,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:17,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074071928] [2024-11-14 02:57:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074071928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:17,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783516484] [2024-11-14 02:57:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:57:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:17,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:17,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:57:17,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 02:57:17,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:17,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 02:57:17,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:17,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-14 02:57:17,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:57:17,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 02:57:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:18,028 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:57:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783516484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:18,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:57:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-14 02:57:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808417265] [2024-11-14 02:57:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:18,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:57:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:57:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:57:18,035 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:18,147 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-14 02:57:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:57:18,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 02:57:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:18,148 INFO L225 Difference]: With dead ends: 32 [2024-11-14 02:57:18,148 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 02:57:18,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-11-14 02:57:18,152 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:18,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 02:57:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-14 02:57:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-14 02:57:18,157 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 9 [2024-11-14 02:57:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:18,157 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-14 02:57:18,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-14 02:57:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:57:18,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:18,158 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:18,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:57:18,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 02:57:18,362 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:18,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 19150092, now seen corresponding path program 1 times [2024-11-14 02:57:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:18,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988703756] [2024-11-14 02:57:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:18,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:18,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988703756] [2024-11-14 02:57:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988703756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:18,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:57:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894355569] [2024-11-14 02:57:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:18,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:18,538 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:18,644 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-14 02:57:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 02:57:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:18,645 INFO L225 Difference]: With dead ends: 29 [2024-11-14 02:57:18,646 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 02:57:18,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:57:18,647 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:18,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 02:57:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 02:57:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-14 02:57:18,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 10 [2024-11-14 02:57:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:18,656 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-14 02:57:18,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-14 02:57:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:57:18,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:18,656 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:18,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 02:57:18,657 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:18,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash 19150093, now seen corresponding path program 1 times [2024-11-14 02:57:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351977837] [2024-11-14 02:57:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:18,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351977837] [2024-11-14 02:57:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351977837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852554107] [2024-11-14 02:57:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:18,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:18,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:57:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:19,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 02:57:19,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:19,191 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:57:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852554107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:57:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-14 02:57:19,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212301418] [2024-11-14 02:57:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:19,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:57:19,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:57:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:57:19,194 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:19,349 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-14 02:57:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:57:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 02:57:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:19,350 INFO L225 Difference]: With dead ends: 36 [2024-11-14 02:57:19,350 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:57:19,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-14 02:57:19,351 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:19,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:57:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-14 02:57:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.5) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-14 02:57:19,357 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 10 [2024-11-14 02:57:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:19,358 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-14 02:57:19,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-14 02:57:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:57:19,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:19,361 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:19,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 02:57:19,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 02:57:19,561 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:19,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:19,562 INFO L85 PathProgramCache]: Analyzing trace with hash 593694755, now seen corresponding path program 1 times [2024-11-14 02:57:19,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:19,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597759437] [2024-11-14 02:57:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:19,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:19,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597759437] [2024-11-14 02:57:19,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597759437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288581531] [2024-11-14 02:57:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:19,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:57:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:19,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 02:57:20,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:20,179 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc11#1.base_23| Int) (|v_ULTIMATE.start_main_#t~malloc12#1.base_23| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc11#1.base_23|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc11#1.base_23| 0) |v_ULTIMATE.start_main_#t~malloc12#1.base_23| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc11#1.base_23| 1) |v_ULTIMATE.start_main_#t~malloc12#1.base_23|) 0))) is different from true [2024-11-14 02:57:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:20,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:57:20,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288581531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:20,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:57:20,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2024-11-14 02:57:20,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879511508] [2024-11-14 02:57:20,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:20,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2024-11-14 02:57:20,181 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:20,258 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-14 02:57:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 02:57:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:20,260 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:57:20,260 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 02:57:20,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=83, Unknown=1, NotChecked=18, Total=132 [2024-11-14 02:57:20,261 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:20,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2024-11-14 02:57:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 02:57:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 02:57:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.44) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-14 02:57:20,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 11 [2024-11-14 02:57:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:20,267 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-14 02:57:20,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-14 02:57:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 02:57:20,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:20,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:20,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:20,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:57:20,468 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:20,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:20,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1223370758, now seen corresponding path program 1 times [2024-11-14 02:57:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:20,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127834249] [2024-11-14 02:57:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:21,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:21,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127834249] [2024-11-14 02:57:21,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127834249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:21,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327241365] [2024-11-14 02:57:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:21,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:21,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:21,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:21,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:57:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:21,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 02:57:21,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:21,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:21,615 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 16 treesize of output 12 [2024-11-14 02:57:21,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 02:57:21,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 02:57:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:21,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:21,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:21,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2024-11-14 02:57:21,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:21,886 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 36 treesize of output 32 [2024-11-14 02:57:22,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:22,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327241365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:22,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120385966] [2024-11-14 02:57:22,214 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:57:22,214 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:22,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:22,217 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:22,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:23,277 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:24,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1446#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:57:24,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:24,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-14 02:57:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619648643] [2024-11-14 02:57:24,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:24,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 02:57:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 02:57:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 02:57:24,266 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:25,447 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2024-11-14 02:57:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:57:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 02:57:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:25,449 INFO L225 Difference]: With dead ends: 60 [2024-11-14 02:57:25,449 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 02:57:25,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 02:57:25,451 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:25,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 156 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:57:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 02:57:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2024-11-14 02:57:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-14 02:57:25,458 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 12 [2024-11-14 02:57:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:25,458 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-14 02:57:25,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-14 02:57:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 02:57:25,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:25,463 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:25,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:25,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:25,664 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:25,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash -730213661, now seen corresponding path program 1 times [2024-11-14 02:57:25,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:25,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331063748] [2024-11-14 02:57:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:25,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331063748] [2024-11-14 02:57:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331063748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:25,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:57:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215430386] [2024-11-14 02:57:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:25,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:57:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:57:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:57:25,759 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:25,820 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-14 02:57:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:57:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 02:57:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:25,821 INFO L225 Difference]: With dead ends: 39 [2024-11-14 02:57:25,821 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 02:57:25,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:57:25,822 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:25,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 02:57:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-14 02:57:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-14 02:57:25,829 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 13 [2024-11-14 02:57:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:25,832 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-14 02:57:25,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-14 02:57:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 02:57:25,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:25,833 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:25,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 02:57:25,833 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:25,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:25,834 INFO L85 PathProgramCache]: Analyzing trace with hash -730213660, now seen corresponding path program 1 times [2024-11-14 02:57:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:25,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006627386] [2024-11-14 02:57:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:26,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:26,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006627386] [2024-11-14 02:57:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006627386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:26,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:57:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:57:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576677477] [2024-11-14 02:57:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:26,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:57:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:57:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:57:26,068 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:26,143 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-11-14 02:57:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:57:26,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 02:57:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:26,144 INFO L225 Difference]: With dead ends: 41 [2024-11-14 02:57:26,144 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 02:57:26,144 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 [2024-11-14 02:57:26,145 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:26,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 40 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 02:57:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-14 02:57:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-14 02:57:26,151 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 13 [2024-11-14 02:57:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:26,153 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-14 02:57:26,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-14 02:57:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:57:26,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:26,154 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:26,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 02:57:26,154 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:26,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1894698685, now seen corresponding path program 2 times [2024-11-14 02:57:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:26,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421447629] [2024-11-14 02:57:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:26,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:26,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421447629] [2024-11-14 02:57:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421447629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054313436] [2024-11-14 02:57:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:57:26,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:26,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:26,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:57:26,530 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 02:57:26,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:26,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 02:57:26,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:26,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:26,671 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 17 treesize of output 13 [2024-11-14 02:57:26,759 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 22 treesize of output 17 [2024-11-14 02:57:26,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:26,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:57:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:26,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:27,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:27,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2024-11-14 02:57:27,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:27,199 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 36 treesize of output 32 [2024-11-14 02:57:27,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:57:27,235 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 23 treesize of output 19 [2024-11-14 02:57:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054313436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116145927] [2024-11-14 02:57:27,444 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:57:27,445 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:27,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:27,445 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:27,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:28,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:29,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1849#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:57:29,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:29,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:29,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-14 02:57:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508115013] [2024-11-14 02:57:29,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:29,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 02:57:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 02:57:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-11-14 02:57:29,079 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:30,366 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-11-14 02:57:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 02:57:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 02:57:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:30,367 INFO L225 Difference]: With dead ends: 69 [2024-11-14 02:57:30,367 INFO L226 Difference]: Without dead ends: 68 [2024-11-14 02:57:30,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 02:57:30,369 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:30,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 86 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:57:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-14 02:57:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2024-11-14 02:57:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-11-14 02:57:30,372 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2024-11-14 02:57:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:30,372 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-11-14 02:57:30,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-11-14 02:57:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 02:57:30,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:30,373 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:30,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 02:57:30,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 02:57:30,577 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:30,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -260696650, now seen corresponding path program 3 times [2024-11-14 02:57:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503929336] [2024-11-14 02:57:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:31,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503929336] [2024-11-14 02:57:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503929336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858675526] [2024-11-14 02:57:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:57:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:31,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:31,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:57:31,281 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:57:31,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:31,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 02:57:31,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:31,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:31,358 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 16 treesize of output 12 [2024-11-14 02:57:31,429 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 21 treesize of output 16 [2024-11-14 02:57:31,737 INFO L349 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2024-11-14 02:57:31,740 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 2 case distinctions, treesize of input 28 treesize of output 27 [2024-11-14 02:57:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:31,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:32,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:32,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2024-11-14 02:57:32,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:32,276 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 2 case distinctions, treesize of input 61 treesize of output 61 [2024-11-14 02:57:32,292 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 23 treesize of output 19 [2024-11-14 02:57:32,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-11-14 02:57:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858675526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:32,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246885944] [2024-11-14 02:57:32,491 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:57:32,491 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:32,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:32,492 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:32,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:33,310 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:34,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2116#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:57:34,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:34,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:34,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2024-11-14 02:57:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721808735] [2024-11-14 02:57:34,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:34,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 02:57:34,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:34,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 02:57:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:57:34,407 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:36,399 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-14 02:57:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 02:57:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 02:57:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:36,401 INFO L225 Difference]: With dead ends: 86 [2024-11-14 02:57:36,401 INFO L226 Difference]: Without dead ends: 85 [2024-11-14 02:57:36,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 02:57:36,403 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:36,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 155 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:57:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-14 02:57:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2024-11-14 02:57:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-14 02:57:36,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 16 [2024-11-14 02:57:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:36,407 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-14 02:57:36,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-14 02:57:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:57:36,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:36,408 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:36,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:36,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:36,612 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:36,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash -276467746, now seen corresponding path program 1 times [2024-11-14 02:57:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:36,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689550883] [2024-11-14 02:57:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:36,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:36,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689550883] [2024-11-14 02:57:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689550883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:36,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755391135] [2024-11-14 02:57:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:36,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:36,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:36,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:57:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:37,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 02:57:37,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:37,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 02:57:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:57:37,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:37,409 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 18 treesize of output 10 [2024-11-14 02:57:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:37,436 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:57:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755391135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:57:37,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:57:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2024-11-14 02:57:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865574650] [2024-11-14 02:57:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:57:37,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 02:57:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 02:57:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:57:37,439 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:37,546 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-11-14 02:57:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:57:37,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 02:57:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:37,547 INFO L225 Difference]: With dead ends: 81 [2024-11-14 02:57:37,548 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 02:57:37,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:57:37,548 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:37,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:57:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 02:57:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2024-11-14 02:57:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2024-11-14 02:57:37,552 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 18 [2024-11-14 02:57:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:37,552 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2024-11-14 02:57:37,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2024-11-14 02:57:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 02:57:37,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:37,553 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:37,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:37,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:37,757 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:37,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash -143612696, now seen corresponding path program 4 times [2024-11-14 02:57:37,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:37,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072561854] [2024-11-14 02:57:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:37,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:38,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072561854] [2024-11-14 02:57:38,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072561854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:38,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495938565] [2024-11-14 02:57:38,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:57:38,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:38,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:38,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:57:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:38,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 02:57:38,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:38,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:39,135 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 16 treesize of output 12 [2024-11-14 02:57:39,246 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 21 treesize of output 16 [2024-11-14 02:57:39,613 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-14 02:57:39,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 18 [2024-11-14 02:57:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:39,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:40,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:40,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2024-11-14 02:57:40,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:40,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 61 [2024-11-14 02:57:40,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-11-14 02:57:40,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495938565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415846598] [2024-11-14 02:57:40,540 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:57:40,540 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:40,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:40,541 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:40,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:41,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:42,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2518#true' at error location [2024-11-14 02:57:42,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:42,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-14 02:57:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158547746] [2024-11-14 02:57:42,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:42,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:57:42,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:57:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1763, Unknown=4, NotChecked=0, Total=1892 [2024-11-14 02:57:42,066 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:44,222 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2024-11-14 02:57:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 02:57:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 02:57:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:44,224 INFO L225 Difference]: With dead ends: 123 [2024-11-14 02:57:44,224 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 02:57:44,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=287, Invalid=3615, Unknown=4, NotChecked=0, Total=3906 [2024-11-14 02:57:44,227 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:44,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 383 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:57:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 02:57:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2024-11-14 02:57:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.247191011235955) internal successors, (111), 92 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-11-14 02:57:44,233 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 20 [2024-11-14 02:57:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:44,233 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-11-14 02:57:44,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-11-14 02:57:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:57:44,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:44,241 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:44,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 02:57:44,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:44,460 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:44,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash -916872033, now seen corresponding path program 5 times [2024-11-14 02:57:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916875022] [2024-11-14 02:57:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:46,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:46,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916875022] [2024-11-14 02:57:46,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916875022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:46,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563333467] [2024-11-14 02:57:46,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:57:46,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:46,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:46,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:46,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 02:57:46,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:57:46,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:46,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 02:57:46,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:47,007 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 10 treesize of output 8 [2024-11-14 02:57:47,287 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 16 treesize of output 12 [2024-11-14 02:57:47,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-14 02:57:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:47,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:47,861 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2024-11-14 02:57:47,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:47,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2024-11-14 02:57:47,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:47,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 86 treesize of output 90 [2024-11-14 02:57:47,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2024-11-14 02:57:48,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:57:48,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563333467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:48,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089552658] [2024-11-14 02:57:48,560 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:57:48,560 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:48,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:48,561 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:48,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:49,246 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:50,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3094#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:57:50,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:50,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:50,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2024-11-14 02:57:50,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445976506] [2024-11-14 02:57:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:50,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 02:57:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 02:57:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1922, Unknown=1, NotChecked=88, Total=2162 [2024-11-14 02:57:50,442 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:52,155 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2024-11-14 02:57:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 02:57:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 02:57:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:52,158 INFO L225 Difference]: With dead ends: 129 [2024-11-14 02:57:52,158 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 02:57:52,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=334, Invalid=3829, Unknown=1, NotChecked=126, Total=4290 [2024-11-14 02:57:52,160 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:52,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 162 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 642 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2024-11-14 02:57:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 02:57:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2024-11-14 02:57:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2024-11-14 02:57:52,169 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 22 [2024-11-14 02:57:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:52,169 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2024-11-14 02:57:52,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2024-11-14 02:57:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:57:52,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:52,173 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:52,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 02:57:52,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:52,374 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:52,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -139084662, now seen corresponding path program 1 times [2024-11-14 02:57:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148828103] [2024-11-14 02:57:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:52,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148828103] [2024-11-14 02:57:52,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148828103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435249219] [2024-11-14 02:57:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:52,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:52,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 02:57:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:52,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 02:57:52,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:52,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:53,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:57:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:57:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435249219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:53,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420655929] [2024-11-14 02:57:53,133 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 02:57:53,133 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:53,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:53,133 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:53,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:53,945 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:55,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3524#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.base_27| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_27| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_27|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_27|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_27|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_27|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:57:55,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:55,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:55,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-14 02:57:55,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293948730] [2024-11-14 02:57:55,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:55,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 02:57:55,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 02:57:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 02:57:55,938 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:56,275 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2024-11-14 02:57:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:57:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 02:57:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:56,277 INFO L225 Difference]: With dead ends: 128 [2024-11-14 02:57:56,277 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 02:57:56,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 02:57:56,278 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:56,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:57:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 02:57:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2024-11-14 02:57:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.2118644067796611) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2024-11-14 02:57:56,285 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 22 [2024-11-14 02:57:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:56,285 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2024-11-14 02:57:56,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2024-11-14 02:57:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 02:57:56,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:56,288 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:56,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 02:57:56,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 02:57:56,490 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:57:56,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash -989752682, now seen corresponding path program 6 times [2024-11-14 02:57:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132783077] [2024-11-14 02:57:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:57,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:57,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132783077] [2024-11-14 02:57:57,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132783077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:57,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894239774] [2024-11-14 02:57:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:57:57,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:57,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:57,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 02:57:57,304 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:57:57,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:57,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 02:57:57,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:57,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:57:57,617 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 16 treesize of output 12 [2024-11-14 02:57:57,679 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 21 treesize of output 16 [2024-11-14 02:57:58,327 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-14 02:57:58,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 34 [2024-11-14 02:57:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:58,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:58,990 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_407 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_407) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2024-11-14 02:57:59,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:59,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 61 [2024-11-14 02:57:59,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:57:59,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 119 [2024-11-14 02:57:59,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 29 [2024-11-14 02:57:59,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:00,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894239774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:58:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761717044] [2024-11-14 02:58:00,011 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:58:00,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:58:00,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:58:00,012 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:58:00,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:58:00,447 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:58:01,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3982#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:58:01,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:58:01,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:58:01,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 50 [2024-11-14 02:58:01,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552213284] [2024-11-14 02:58:01,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:58:01,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 02:58:01,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:58:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 02:58:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3108, Unknown=1, NotChecked=112, Total=3422 [2024-11-14 02:58:01,677 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:58:06,041 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2024-11-14 02:58:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 02:58:06,042 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 02:58:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:58:06,043 INFO L225 Difference]: With dead ends: 238 [2024-11-14 02:58:06,043 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 02:58:06,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=589, Invalid=8323, Unknown=22, NotChecked=186, Total=9120 [2024-11-14 02:58:06,046 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:58:06,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 545 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1905 Invalid, 5 Unknown, 133 Unchecked, 1.6s Time] [2024-11-14 02:58:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 02:58:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 166. [2024-11-14 02:58:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.2037037037037037) internal successors, (195), 165 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 195 transitions. [2024-11-14 02:58:06,052 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 195 transitions. Word has length 24 [2024-11-14 02:58:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:58:06,053 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 195 transitions. [2024-11-14 02:58:06,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 195 transitions. [2024-11-14 02:58:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 02:58:06,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:58:06,054 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:58:06,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 02:58:06,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:06,255 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:58:06,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:58:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2031326724, now seen corresponding path program 1 times [2024-11-14 02:58:06,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:58:06,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584502825] [2024-11-14 02:58:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:58:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:58:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:58:06,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:58:06,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584502825] [2024-11-14 02:58:06,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584502825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:58:06,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725548528] [2024-11-14 02:58:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:58:06,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:58:06,783 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:58:06,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 02:58:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:06,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 02:58:06,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:58:06,970 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-14 02:58:06,970 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 02:58:06,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:07,505 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 11 [2024-11-14 02:58:07,570 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 20 treesize of output 15 [2024-11-14 02:58:07,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:07,791 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 19 treesize of output 15 [2024-11-14 02:58:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:07,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:58:08,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:08,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2024-11-14 02:58:08,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:08,393 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 40 treesize of output 34 [2024-11-14 02:58:08,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 02:58:09,187 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:58:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:09,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725548528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:58:09,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576719614] [2024-11-14 02:58:09,190 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 02:58:09,190 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:58:09,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:58:09,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:58:09,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:58:10,240 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:58:15,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4669#(and (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (exists ((|v_#memory_int_155| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_113| Int)) (and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_113|) 1) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_113|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_113|)) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#memory_int| (store |v_#memory_int_155| |v_ULTIMATE.start_cstrncat_~d~0#1.base_113| (store (select |v_#memory_int_155| |v_ULTIMATE.start_cstrncat_~d~0#1.base_113|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_113|)) (select (select |v_#memory_int_155| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0)))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (not (= (select (select |v_#memory_int_155| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-14 02:58:15,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:58:15,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:58:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 43 [2024-11-14 02:58:15,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693750645] [2024-11-14 02:58:15,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:58:15,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 02:58:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:58:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 02:58:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3146, Unknown=1, NotChecked=0, Total=3422 [2024-11-14 02:58:15,290 INFO L87 Difference]: Start difference. First operand 166 states and 195 transitions. Second operand has 44 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:58:22,505 INFO L93 Difference]: Finished difference Result 218 states and 247 transitions. [2024-11-14 02:58:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 02:58:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 02:58:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:58:22,507 INFO L225 Difference]: With dead ends: 218 [2024-11-14 02:58:22,507 INFO L226 Difference]: Without dead ends: 217 [2024-11-14 02:58:22,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=581, Invalid=6558, Unknown=1, NotChecked=0, Total=7140 [2024-11-14 02:58:22,511 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 196 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:58:22,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 342 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 02:58:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-14 02:58:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 160. [2024-11-14 02:58:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 159 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2024-11-14 02:58:22,519 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 27 [2024-11-14 02:58:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:58:22,519 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2024-11-14 02:58:22,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2024-11-14 02:58:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 02:58:22,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:58:22,521 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:58:22,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 02:58:22,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 02:58:22,725 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:58:22,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:58:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1301782008, now seen corresponding path program 2 times [2024-11-14 02:58:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:58:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434375697] [2024-11-14 02:58:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:58:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:58:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:58:23,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:58:23,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434375697] [2024-11-14 02:58:23,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434375697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:58:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608462240] [2024-11-14 02:58:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:58:23,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:58:23,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:58:23,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 02:58:23,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 02:58:23,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:58:23,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 02:58:23,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:58:23,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:24,120 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 13 treesize of output 9 [2024-11-14 02:58:24,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 02:58:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:24,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:58:24,882 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_489 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_489) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2024-11-14 02:58:25,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:25,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 02:58:25,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:25,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 02:58:26,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 02:58:26,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608462240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:58:26,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736953458] [2024-11-14 02:58:26,025 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 02:58:26,025 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:58:26,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:58:26,026 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:58:26,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:58:26,975 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:58:31,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5299#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_44| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_44| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_44|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_44|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_44|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_44|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:58:31,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:58:31,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:58:31,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 28 [2024-11-14 02:58:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879719936] [2024-11-14 02:58:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:58:31,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 02:58:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:58:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 02:58:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1743, Unknown=16, NotChecked=84, Total=1980 [2024-11-14 02:58:31,760 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:58:33,966 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2024-11-14 02:58:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 02:58:33,967 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 02:58:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:58:33,968 INFO L225 Difference]: With dead ends: 145 [2024-11-14 02:58:33,968 INFO L226 Difference]: Without dead ends: 125 [2024-11-14 02:58:33,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=244, Invalid=2824, Unknown=16, NotChecked=108, Total=3192 [2024-11-14 02:58:33,969 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:58:33,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 39 Unchecked, 0.9s Time] [2024-11-14 02:58:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-14 02:58:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-14 02:58:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 124 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2024-11-14 02:58:33,975 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 27 [2024-11-14 02:58:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:58:33,975 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2024-11-14 02:58:33,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:58:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2024-11-14 02:58:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 02:58:33,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:58:33,976 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:58:33,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 02:58:34,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:34,181 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:58:34,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:58:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1953063366, now seen corresponding path program 7 times [2024-11-14 02:58:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:58:34,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969146375] [2024-11-14 02:58:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:58:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:58:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:35,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:58:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969146375] [2024-11-14 02:58:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969146375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:58:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829828760] [2024-11-14 02:58:35,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:58:35,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:35,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:58:35,981 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:58:35,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 02:58:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:36,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 02:58:36,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:58:36,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:38,057 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 16 treesize of output 12 [2024-11-14 02:58:38,239 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 21 treesize of output 16 [2024-11-14 02:58:52,760 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-11-14 02:58:52,760 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 60 treesize of output 42 [2024-11-14 02:58:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:52,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:58:55,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:55,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2024-11-14 02:58:55,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:55,553 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 136 treesize of output 148 [2024-11-14 02:58:55,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:58:55,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 36 [2024-11-14 02:58:58,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:58:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:58:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829828760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:58:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600446116] [2024-11-14 02:58:58,896 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:58:58,896 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:58:58,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:58:58,896 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:58:58,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:58:59,419 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:59:03,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5830#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:59:03,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:59:03,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:59:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2024-11-14 02:59:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588082039] [2024-11-14 02:59:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:03,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 02:59:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 02:59:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=4132, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 02:59:03,648 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:21,353 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2024-11-14 02:59:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 02:59:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 02:59:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:21,355 INFO L225 Difference]: With dead ends: 268 [2024-11-14 02:59:21,355 INFO L226 Difference]: Without dead ends: 254 [2024-11-14 02:59:21,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3849 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=964, Invalid=12146, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 02:59:21,358 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 208 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 11 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:21,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 733 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3011 Invalid, 7 Unknown, 0 Unchecked, 8.4s Time] [2024-11-14 02:59:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-14 02:59:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 151. [2024-11-14 02:59:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 150 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2024-11-14 02:59:21,364 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 28 [2024-11-14 02:59:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:21,364 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2024-11-14 02:59:21,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2024-11-14 02:59:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 02:59:21,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:21,365 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:21,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 02:59:21,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:21,566 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:59:21,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1806118303, now seen corresponding path program 3 times [2024-11-14 02:59:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:21,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058538320] [2024-11-14 02:59:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:21,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:22,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058538320] [2024-11-14 02:59:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058538320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:59:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397914094] [2024-11-14 02:59:22,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:59:22,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:22,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:22,401 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:22,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 02:59:22,612 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:59:22,612 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:22,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 02:59:22,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:22,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:59:22,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:59:23,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 02:59:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 02:59:23,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:23,520 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2024-11-14 02:59:23,540 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2024-11-14 02:59:23,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:59:23,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 02:59:23,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:59:23,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 02:59:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2024-11-14 02:59:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397914094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167189990] [2024-11-14 02:59:24,082 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 02:59:24,083 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:59:24,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:59:24,083 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:59:24,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:59:24,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:59:29,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6553#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_57| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_57| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_57|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_57|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_57|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_57|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:59:29,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:59:29,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:59:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-11-14 02:59:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363514548] [2024-11-14 02:59:29,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:29,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 02:59:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 02:59:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1756, Unknown=12, NotChecked=170, Total=2070 [2024-11-14 02:59:29,564 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:33,040 INFO L93 Difference]: Finished difference Result 323 states and 357 transitions. [2024-11-14 02:59:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 02:59:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 02:59:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:33,042 INFO L225 Difference]: With dead ends: 323 [2024-11-14 02:59:33,042 INFO L226 Difference]: Without dead ends: 206 [2024-11-14 02:59:33,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=323, Invalid=4224, Unknown=17, NotChecked=266, Total=4830 [2024-11-14 02:59:33,043 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:33,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 108 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 479 Invalid, 0 Unknown, 172 Unchecked, 1.2s Time] [2024-11-14 02:59:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-14 02:59:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2024-11-14 02:59:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.1692307692307693) internal successors, (228), 198 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2024-11-14 02:59:33,057 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 29 [2024-11-14 02:59:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:33,058 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2024-11-14 02:59:33,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2024-11-14 02:59:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 02:59:33,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:33,059 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:33,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 02:59:33,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:33,259 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 02:59:33,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -854978186, now seen corresponding path program 8 times [2024-11-14 02:59:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175641096] [2024-11-14 02:59:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:35,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175641096] [2024-11-14 02:59:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175641096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:59:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999092030] [2024-11-14 02:59:35,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:59:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:35,381 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:35,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 02:59:35,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 02:59:35,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:59:35,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 02:59:35,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:35,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:59:36,972 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 16 treesize of output 12 [2024-11-14 02:59:37,142 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 21 treesize of output 16 [2024-11-14 02:59:40,544 INFO L349 Elim1Store]: treesize reduction 27, result has 55.7 percent of original size [2024-11-14 02:59:40,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 60 treesize of output 60 [2024-11-14 02:59:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:40,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:43,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:59:43,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2024-11-14 02:59:43,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:59:43,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 177 [2024-11-14 02:59:43,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2024-11-14 02:59:44,455 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 02:59:46,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 02:59:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999092030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498164441] [2024-11-14 02:59:46,727 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:59:46,727 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:59:46,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:59:46,728 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:59:46,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:59:47,254 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:59:52,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7393#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 02:59:52,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:59:52,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:59:52,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 64 [2024-11-14 02:59:52,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259030431] [2024-11-14 02:59:52,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:59:52,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 02:59:52,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 02:59:52,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=4935, Unknown=9, NotChecked=0, Total=5256 [2024-11-14 02:59:52,402 INFO L87 Difference]: Start difference. First operand 199 states and 228 transitions. Second operand has 64 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:10,012 INFO L93 Difference]: Finished difference Result 402 states and 447 transitions. [2024-11-14 03:00:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 03:00:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-14 03:00:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:10,014 INFO L225 Difference]: With dead ends: 402 [2024-11-14 03:00:10,014 INFO L226 Difference]: Without dead ends: 360 [2024-11-14 03:00:10,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=943, Invalid=15048, Unknown=11, NotChecked=0, Total=16002 [2024-11-14 03:00:10,021 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 342 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:10,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 719 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-14 03:00:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-14 03:00:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 229. [2024-11-14 03:00:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1688888888888889) internal successors, (263), 228 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 263 transitions. [2024-11-14 03:00:10,029 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 263 transitions. Word has length 32 [2024-11-14 03:00:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:10,029 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 263 transitions. [2024-11-14 03:00:10,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 263 transitions. [2024-11-14 03:00:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:00:10,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:10,030 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:10,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:00:10,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:00:10,231 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:00:10,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1425232693, now seen corresponding path program 4 times [2024-11-14 03:00:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003244247] [2024-11-14 03:00:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:00:10,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:10,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003244247] [2024-11-14 03:00:10,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003244247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:10,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045246796] [2024-11-14 03:00:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:00:10,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:10,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:10,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:00:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:11,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:00:11,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:00:11,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:12,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:00:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:00:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045246796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393885430] [2024-11-14 03:00:12,218 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:00:12,218 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:00:12,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:00:12,219 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:00:12,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:00:13,075 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:00:17,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8357#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.base_69| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_70| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_69|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_70|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_69|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_70|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:00:17,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:00:17,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:00:17,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-11-14 03:00:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225089571] [2024-11-14 03:00:17,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:17,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:00:17,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:17,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:00:17,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:00:17,185 INFO L87 Difference]: Start difference. First operand 229 states and 263 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:18,428 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2024-11-14 03:00:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:00:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 03:00:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:18,429 INFO L225 Difference]: With dead ends: 261 [2024-11-14 03:00:18,429 INFO L226 Difference]: Without dead ends: 261 [2024-11-14 03:00:18,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=144, Invalid=1662, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:00:18,430 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:18,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:00:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-14 03:00:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2024-11-14 03:00:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.155378486055777) internal successors, (290), 254 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 290 transitions. [2024-11-14 03:00:18,436 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 290 transitions. Word has length 33 [2024-11-14 03:00:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:18,436 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 290 transitions. [2024-11-14 03:00:18,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 290 transitions. [2024-11-14 03:00:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:00:18,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:18,437 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:18,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:00:18,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:18,638 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:00:18,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1705621237, now seen corresponding path program 1 times [2024-11-14 03:00:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422967774] [2024-11-14 03:00:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:00:20,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422967774] [2024-11-14 03:00:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422967774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113968145] [2024-11-14 03:00:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:20,687 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:20,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:00:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:20,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:00:20,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:00:22,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:00:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113968145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:24,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696470064] [2024-11-14 03:00:24,190 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:00:24,190 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:00:24,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:00:24,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:00:24,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:00:24,872 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:00:32,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9131#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_78| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_77| Int) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_185| Int)) (and (= |#memory_int| (store |v_#memory_int_275| |v_ULTIMATE.start_cstrncat_~d~0#1.base_185| (store (select |v_#memory_int_275| |v_ULTIMATE.start_cstrncat_~d~0#1.base_185|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_185|)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_77|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_78|)))) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_77|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_77|) 1) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_185|) 1) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_78| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_77|)) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_185|)) (not (= (select (select |v_#memory_int_275| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_77|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_78|) 0)) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_185|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_78|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:00:32,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:00:32,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:00:32,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 38 [2024-11-14 03:00:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162467439] [2024-11-14 03:00:32,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:32,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:00:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:00:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2673, Unknown=1, NotChecked=0, Total=2862 [2024-11-14 03:00:32,025 INFO L87 Difference]: Start difference. First operand 255 states and 290 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:35,793 INFO L93 Difference]: Finished difference Result 250 states and 284 transitions. [2024-11-14 03:00:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:00:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 03:00:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:35,795 INFO L225 Difference]: With dead ends: 250 [2024-11-14 03:00:35,795 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 03:00:35,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=362, Invalid=4467, Unknown=1, NotChecked=0, Total=4830 [2024-11-14 03:00:35,797 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:35,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 296 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 03:00:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 03:00:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-14 03:00:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.1629955947136563) internal successors, (264), 230 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 264 transitions. [2024-11-14 03:00:35,804 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 264 transitions. Word has length 34 [2024-11-14 03:00:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:35,804 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 264 transitions. [2024-11-14 03:00:35,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:00:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 264 transitions. [2024-11-14 03:00:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:00:35,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:35,805 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:35,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:36,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:36,006 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:00:36,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -647806554, now seen corresponding path program 9 times [2024-11-14 03:00:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:36,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490429098] [2024-11-14 03:00:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:36,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:00:38,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490429098] [2024-11-14 03:00:38,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490429098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333448163] [2024-11-14 03:00:38,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:00:38,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:38,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:38,519 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:38,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:00:38,772 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:00:38,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:00:38,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-14 03:00:38,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:38,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:00:39,853 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 16 treesize of output 12 [2024-11-14 03:00:40,082 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 21 treesize of output 16 [2024-11-14 03:00:43,918 INFO L349 Elim1Store]: treesize reduction 24, result has 66.2 percent of original size [2024-11-14 03:00:43,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 68 treesize of output 77 [2024-11-14 03:00:43,928 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-14 03:00:43,954 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 03:00:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:00:44,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:00:49,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:00:49,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 97 [2024-11-14 03:00:49,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:00:49,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 186 treesize of output 206 [2024-11-14 03:00:49,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:00:49,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 50 [2024-11-14 03:00:49,451 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 23 treesize of output 19 [2024-11-14 03:00:49,718 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 03:00:49,730 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-14 03:00:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:00:50,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333448163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:00:50,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036170208] [2024-11-14 03:00:50,444 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:00:50,444 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:00:50,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:00:50,444 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:00:50,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:00:50,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:00:56,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9932#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:00:56,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:00:56,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:00:56,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 19] total 61 [2024-11-14 03:00:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331997362] [2024-11-14 03:00:56,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:56,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 03:00:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 03:00:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=4571, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:00:56,061 INFO L87 Difference]: Start difference. First operand 231 states and 264 transitions. Second operand has 62 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 62 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:01:21,545 INFO L93 Difference]: Finished difference Result 504 states and 562 transitions. [2024-11-14 03:01:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 03:01:21,546 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 62 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-14 03:01:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:01:21,548 INFO L225 Difference]: With dead ends: 504 [2024-11-14 03:01:21,548 INFO L226 Difference]: Without dead ends: 494 [2024-11-14 03:01:21,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4456 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=1513, Invalid=16309, Unknown=0, NotChecked=0, Total=17822 [2024-11-14 03:01:21,551 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 734 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:01:21,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 843 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-11-14 03:01:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2024-11-14 03:01:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 290. [2024-11-14 03:01:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.1783216783216783) internal successors, (337), 289 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 337 transitions. [2024-11-14 03:01:21,568 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 337 transitions. Word has length 36 [2024-11-14 03:01:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:01:21,569 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 337 transitions. [2024-11-14 03:01:21,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 62 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 337 transitions. [2024-11-14 03:01:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:01:21,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:01:21,571 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:01:21,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 03:01:21,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 03:01:21,794 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:01:21,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:01:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash -919307731, now seen corresponding path program 5 times [2024-11-14 03:01:21,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:01:21,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775423656] [2024-11-14 03:01:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:01:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:01:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:01:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:01:22,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:01:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775423656] [2024-11-14 03:01:22,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775423656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:01:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317474693] [2024-11-14 03:01:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:01:22,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:01:22,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:01:22,908 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:01:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:01:23,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:01:23,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:01:23,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 03:01:23,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:23,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:01:23,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:01:24,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:01:24,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:01:24,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:24,879 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 19 treesize of output 15 [2024-11-14 03:01:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:01:25,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:27,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:27,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:01:27,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:27,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2024-11-14 03:01:27,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:01:27,274 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 13 treesize of output 9 [2024-11-14 03:01:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:01:28,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317474693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:01:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180030648] [2024-11-14 03:01:28,073 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:01:28,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:01:28,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:01:28,073 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:01:28,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:01:28,817 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:01:34,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11124#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.base_92| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_93| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_93|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_92|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_93|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_92|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:01:34,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:01:34,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:01:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2024-11-14 03:01:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715403121] [2024-11-14 03:01:34,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:01:34,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 03:01:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:01:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 03:01:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2994, Unknown=4, NotChecked=0, Total=3192 [2024-11-14 03:01:34,981 INFO L87 Difference]: Start difference. First operand 290 states and 337 transitions. Second operand has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:01:41,475 INFO L93 Difference]: Finished difference Result 377 states and 419 transitions. [2024-11-14 03:01:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 03:01:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-14 03:01:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:01:41,476 INFO L225 Difference]: With dead ends: 377 [2024-11-14 03:01:41,476 INFO L226 Difference]: Without dead ends: 347 [2024-11-14 03:01:41,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=607, Invalid=7399, Unknown=4, NotChecked=0, Total=8010 [2024-11-14 03:01:41,478 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:01:41,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 80 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 03:01:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-14 03:01:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 334. [2024-11-14 03:01:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.1575757575757575) internal successors, (382), 333 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 382 transitions. [2024-11-14 03:01:41,486 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 382 transitions. Word has length 38 [2024-11-14 03:01:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:01:41,486 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 382 transitions. [2024-11-14 03:01:41,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:01:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 382 transitions. [2024-11-14 03:01:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:01:41,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:01:41,487 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:01:41,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:01:41,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 03:01:41,688 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:01:41,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:01:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1702562907, now seen corresponding path program 2 times [2024-11-14 03:01:41,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:01:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446389183] [2024-11-14 03:01:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:01:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:01:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:01:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:01:43,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:01:43,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446389183] [2024-11-14 03:01:43,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446389183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:01:43,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128069041] [2024-11-14 03:01:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:01:43,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:01:43,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:01:43,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:01:43,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:01:44,042 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:01:44,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:01:44,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-14 03:01:44,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:01:44,116 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-14 03:01:44,117 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 03:01:44,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:01:45,596 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 21 treesize of output 17 [2024-11-14 03:01:45,947 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 26 treesize of output 21 [2024-11-14 03:01:46,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:46,947 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 24 [2024-11-14 03:01:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:01:48,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:01:51,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:51,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2024-11-14 03:01:51,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:01:51,716 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 36 treesize of output 35 [2024-11-14 03:01:51,726 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 9 treesize of output 7 [2024-11-14 03:01:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:01:55,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128069041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:01:55,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984311191] [2024-11-14 03:01:55,381 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:01:55,381 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:01:55,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:01:55,382 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:01:55,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:01:56,313 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:02:05,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12195#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (exists ((|v_#memory_int_345| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_100| Int) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_236| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_101| Int)) (and (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_101|) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_101| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_100|)) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_236|) (= |#memory_int| (store |v_#memory_int_345| |v_ULTIMATE.start_cstrncat_~d~0#1.base_236| (store (select |v_#memory_int_345| |v_ULTIMATE.start_cstrncat_~d~0#1.base_236|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_236|) (- 1)) (select (select |v_#memory_int_345| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_100|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_101|)))) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_236|) 1) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_236|)) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_100|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_100|) 1) (not (= (select (select |v_#memory_int_345| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_100|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_101|) 0)))) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:02:05,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:02:05,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:02:05,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 56 [2024-11-14 03:02:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145291101] [2024-11-14 03:02:05,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:02:05,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 03:02:05,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:02:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 03:02:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=4788, Unknown=1, NotChecked=0, Total=5112 [2024-11-14 03:02:05,024 INFO L87 Difference]: Start difference. First operand 334 states and 382 transitions. Second operand has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:02:22,301 INFO L93 Difference]: Finished difference Result 449 states and 501 transitions. [2024-11-14 03:02:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 03:02:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-14 03:02:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:02:22,304 INFO L225 Difference]: With dead ends: 449 [2024-11-14 03:02:22,304 INFO L226 Difference]: Without dead ends: 426 [2024-11-14 03:02:22,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1255, Invalid=14494, Unknown=1, NotChecked=0, Total=15750 [2024-11-14 03:02:22,305 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:02:22,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 177 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:02:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-14 03:02:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 366. [2024-11-14 03:02:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 362 states have (on average 1.1519337016574585) internal successors, (417), 365 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 417 transitions. [2024-11-14 03:02:22,314 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 417 transitions. Word has length 38 [2024-11-14 03:02:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:02:22,314 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 417 transitions. [2024-11-14 03:02:22,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 417 transitions. [2024-11-14 03:02:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:02:22,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:02:22,316 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:02:22,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:02:22,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 03:02:22,517 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:02:22,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:02:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 882233442, now seen corresponding path program 1 times [2024-11-14 03:02:22,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:02:22,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558912420] [2024-11-14 03:02:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:02:22,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:02:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:02:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:02:25,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:02:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558912420] [2024-11-14 03:02:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558912420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:02:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631285036] [2024-11-14 03:02:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:02:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:02:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:02:25,310 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:02:25,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:02:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:02:25,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-14 03:02:25,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:02:25,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:02:27,149 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 17 treesize of output 13 [2024-11-14 03:02:27,440 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 22 treesize of output 17 [2024-11-14 03:02:30,621 INFO L349 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2024-11-14 03:02:30,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2024-11-14 03:02:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 46 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:02:31,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:02:32,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:02:32,719 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2024-11-14 03:02:32,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:02:32,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 63 [2024-11-14 03:02:32,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:02:32,794 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 23 treesize of output 15 [2024-11-14 03:02:35,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:02:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:02:35,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631285036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:02:35,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818477805] [2024-11-14 03:02:35,616 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:02:35,616 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:02:35,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:02:35,617 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:02:35,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:02:36,227 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:02:41,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13451#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.base_109| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_110| Int)) (and (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_110| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_109|)) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_109|) (= |ULTIMATE.start_cstrncat_#t~mem5#1| (select (select |#memory_int| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_109|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_110|)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_109|) 1) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_110|))) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:02:41,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:02:41,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:02:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2024-11-14 03:02:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225086869] [2024-11-14 03:02:41,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:02:41,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:02:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:02:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:02:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5030, Unknown=2, NotChecked=0, Total=5402 [2024-11-14 03:02:41,465 INFO L87 Difference]: Start difference. First operand 366 states and 417 transitions. Second operand has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:48,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:02:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:02:57,271 INFO L93 Difference]: Finished difference Result 364 states and 412 transitions. [2024-11-14 03:02:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:02:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-14 03:02:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:02:57,274 INFO L225 Difference]: With dead ends: 364 [2024-11-14 03:02:57,274 INFO L226 Difference]: Without dead ends: 345 [2024-11-14 03:02:57,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=746, Invalid=8756, Unknown=4, NotChecked=0, Total=9506 [2024-11-14 03:02:57,276 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:02:57,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 321 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1221 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-11-14 03:02:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-14 03:02:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 334. [2024-11-14 03:02:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.1575757575757575) internal successors, (382), 333 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 382 transitions. [2024-11-14 03:02:57,288 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 382 transitions. Word has length 44 [2024-11-14 03:02:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:02:57,288 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 382 transitions. [2024-11-14 03:02:57,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:02:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 382 transitions. [2024-11-14 03:02:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:02:57,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:02:57,290 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:02:57,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:02:57,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:02:57,491 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:02:57,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:02:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 861330531, now seen corresponding path program 2 times [2024-11-14 03:02:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:02:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89618675] [2024-11-14 03:02:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:02:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:02:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:03:01,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89618675] [2024-11-14 03:03:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89618675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:03:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443866799] [2024-11-14 03:03:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:03:01,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:01,484 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:03:01,824 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 03:03:01,824 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:03:01,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-14 03:03:01,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:01,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:03:04,232 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 11 [2024-11-14 03:03:04,427 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 20 treesize of output 15 [2024-11-14 03:03:07,948 INFO L349 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2024-11-14 03:03:07,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 59 treesize of output 50 [2024-11-14 03:03:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:03:08,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:03:11,646 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_980 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_980) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2024-11-14 03:03:11,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:03:11,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 87 [2024-11-14 03:03:11,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:03:11,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 165 treesize of output 179 [2024-11-14 03:03:11,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:03:11,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 67 treesize of output 43 [2024-11-14 03:03:17,471 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 10 treesize of output 8 [2024-11-14 03:03:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 45 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:03:17,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443866799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:03:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682492844] [2024-11-14 03:03:17,577 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:03:17,577 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:03:17,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:03:17,577 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:03:17,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:03:18,208 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:03:30,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14557#(and (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_279| Int) (|v_#memory_int_395| (Array Int (Array Int Int)))) (and (<= 1 |#StackHeapBarrier|) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_279|)) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= (store |v_#memory_int_395| |v_ULTIMATE.start_cstrncat_~d~0#1.base_279| (store (select |v_#memory_int_395| |v_ULTIMATE.start_cstrncat_~d~0#1.base_279|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_279|) (- 1)) (select (select |v_#memory_int_395| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0))) |#memory_int|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_279|) 1) (not (= (select (select |v_#memory_int_395| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0) 0)) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_279|))) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-14 03:03:30,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:03:30,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:03:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 79 [2024-11-14 03:03:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625804394] [2024-11-14 03:03:30,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:03:30,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-14 03:03:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-14 03:03:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=8314, Unknown=2, NotChecked=184, Total=8930 [2024-11-14 03:03:30,721 INFO L87 Difference]: Start difference. First operand 334 states and 382 transitions. Second operand has 80 states, 80 states have (on average 1.55) internal successors, (124), 79 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:03,943 INFO L93 Difference]: Finished difference Result 474 states and 531 transitions. [2024-11-14 03:04:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 03:04:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.55) internal successors, (124), 79 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-14 03:04:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:03,944 INFO L225 Difference]: With dead ends: 474 [2024-11-14 03:04:03,944 INFO L226 Difference]: Without dead ends: 457 [2024-11-14 03:04:03,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 158 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7620 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=1362, Invalid=23736, Unknown=28, NotChecked=314, Total=25440 [2024-11-14 03:04:03,945 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 54 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4575 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:03,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 855 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4575 Invalid, 21 Unknown, 157 Unchecked, 13.6s Time] [2024-11-14 03:04:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-14 03:04:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 354. [2024-11-14 03:04:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.1714285714285715) internal successors, (410), 353 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 410 transitions. [2024-11-14 03:04:03,951 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 410 transitions. Word has length 45 [2024-11-14 03:04:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:03,952 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 410 transitions. [2024-11-14 03:04:03,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.55) internal successors, (124), 79 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 410 transitions. [2024-11-14 03:04:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:04:03,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:03,952 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:03,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:04:04,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 03:04:04,153 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:04:04,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1871564642, now seen corresponding path program 6 times [2024-11-14 03:04:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004151234] [2024-11-14 03:04:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:04:06,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004151234] [2024-11-14 03:04:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004151234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015666105] [2024-11-14 03:04:06,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:04:06,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:06,095 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:06,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:04:06,368 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:04:06,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:04:06,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 03:04:06,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:06,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:04:07,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:04:07,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:04:07,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:04:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:04:08,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:09,132 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1045 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1045) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2024-11-14 03:04:09,159 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1045 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1045) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2024-11-14 03:04:09,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:04:09,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:04:09,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:04:09,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 03:04:09,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 03:04:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 2 not checked. [2024-11-14 03:04:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015666105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047605296] [2024-11-14 03:04:10,302 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:04:10,302 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:10,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:10,302 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:10,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:11,116 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:17,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15836#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.base_129| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_129|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_129|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:04:17,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:17,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:04:17,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-11-14 03:04:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020403697] [2024-11-14 03:04:17,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:17,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:04:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:04:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2907, Unknown=17, NotChecked=218, Total=3306 [2024-11-14 03:04:17,556 INFO L87 Difference]: Start difference. First operand 354 states and 410 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:23,508 INFO L93 Difference]: Finished difference Result 563 states and 641 transitions. [2024-11-14 03:04:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:04:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-14 03:04:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:23,511 INFO L225 Difference]: With dead ends: 563 [2024-11-14 03:04:23,511 INFO L226 Difference]: Without dead ends: 456 [2024-11-14 03:04:23,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=301, Invalid=4946, Unknown=17, NotChecked=286, Total=5550 [2024-11-14 03:04:23,512 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:23,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 307 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1114 Invalid, 0 Unknown, 132 Unchecked, 3.0s Time] [2024-11-14 03:04:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-11-14 03:04:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 427. [2024-11-14 03:04:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 423 states have (on average 1.1749408983451537) internal successors, (497), 426 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 497 transitions. [2024-11-14 03:04:23,522 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 497 transitions. Word has length 45 [2024-11-14 03:04:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:23,522 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 497 transitions. [2024-11-14 03:04:23,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 497 transitions. [2024-11-14 03:04:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:04:23,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:23,523 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:23,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:04:23,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 03:04:23,725 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:04:23,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2102612347, now seen corresponding path program 3 times [2024-11-14 03:04:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:23,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034102842] [2024-11-14 03:04:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:04:27,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:27,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034102842] [2024-11-14 03:04:27,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034102842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:27,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399383777] [2024-11-14 03:04:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:04:27,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:27,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:27,504 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:27,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:04:27,793 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:04:27,793 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:04:27,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 03:04:27,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:27,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:04:30,078 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 17 treesize of output 13 [2024-11-14 03:04:30,341 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 22 treesize of output 17 [2024-11-14 03:04:44,543 INFO L349 Elim1Store]: treesize reduction 8, result has 74.2 percent of original size [2024-11-14 03:04:44,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2024-11-14 03:04:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 69 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:04:45,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:48,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:04:48,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2024-11-14 03:04:48,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:04:48,902 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 92 [2024-11-14 03:04:48,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:04:48,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2024-11-14 03:04:53,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:04:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:04:53,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399383777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612423403] [2024-11-14 03:04:53,774 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:04:53,774 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:53,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:53,775 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:53,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:54,493 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:05:05,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17220#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_138| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_137| Int) (|v_#memory_int_452| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_313| Int)) (and (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_313|) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_137|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_137|) 1) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_138|) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_138| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_137|)) (= |#memory_int| (store |v_#memory_int_452| |v_ULTIMATE.start_cstrncat_~d~0#1.base_313| (store (select |v_#memory_int_452| |v_ULTIMATE.start_cstrncat_~d~0#1.base_313|) (+ (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_313|) (- 1)) (select (select |v_#memory_int_452| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_137|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_138|)))) (not (= (select (select |v_#memory_int_452| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_137|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_138|) 0)) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_313|)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_313|) 1))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:05:05,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:05:05,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:05:05,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-11-14 03:05:05,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879813368] [2024-11-14 03:05:05,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:05:05,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 03:05:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 03:05:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=7299, Unknown=7, NotChecked=0, Total=7832 [2024-11-14 03:05:05,563 INFO L87 Difference]: Start difference. First operand 427 states and 497 transitions. Second operand has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 72 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:05:15,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:21,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:24,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:32,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:34,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:45,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:47,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:05:58,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:00,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:02,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:04,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:15,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:20,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:22,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:25,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:27,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:29,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:31,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:33,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:35,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:37,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:06:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:06:38,260 INFO L93 Difference]: Finished difference Result 498 states and 567 transitions. [2024-11-14 03:06:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 03:06:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 72 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-14 03:06:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:06:38,262 INFO L225 Difference]: With dead ends: 498 [2024-11-14 03:06:38,262 INFO L226 Difference]: Without dead ends: 471 [2024-11-14 03:06:38,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4691 ImplicationChecksByTransitivity, 78.8s TimeCoverageRelationStatistics Valid=1042, Invalid=14939, Unknown=21, NotChecked=0, Total=16002 [2024-11-14 03:06:38,263 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 41 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:06:38,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 454 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2626 Invalid, 20 Unknown, 0 Unchecked, 50.1s Time] [2024-11-14 03:06:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-14 03:06:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 426. [2024-11-14 03:06:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 422 states have (on average 1.1729857819905214) internal successors, (495), 425 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:06:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 495 transitions. [2024-11-14 03:06:38,270 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 495 transitions. Word has length 46 [2024-11-14 03:06:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:06:38,270 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 495 transitions. [2024-11-14 03:06:38,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 72 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:06:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 495 transitions. [2024-11-14 03:06:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:06:38,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:06:38,271 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:06:38,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:06:38,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 03:06:38,476 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:06:38,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:06:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1567283060, now seen corresponding path program 3 times [2024-11-14 03:06:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:06:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923676023] [2024-11-14 03:06:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:06:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:06:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:06:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:06:41,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:06:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923676023] [2024-11-14 03:06:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923676023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:06:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428766442] [2024-11-14 03:06:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:06:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:06:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:06:41,446 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:06:41,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:06:41,721 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:06:41,722 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:06:41,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-14 03:06:41,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:06:41,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:06:41,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-14 03:06:45,050 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 11 [2024-11-14 03:06:45,279 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 20 treesize of output 15 [2024-11-14 03:06:49,157 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-14 03:06:49,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 55 [2024-11-14 03:06:49,167 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 03:06:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:06:49,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:06:54,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:06:54,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 87 [2024-11-14 03:06:54,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:06:54,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 179 [2024-11-14 03:06:54,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 43 [2024-11-14 03:07:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:07:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:07:02,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428766442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:07:02,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281060716] [2024-11-14 03:07:02,948 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:07:02,948 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:07:02,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:07:02,948 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:07:02,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:07:03,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:07:16,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18595#(and (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (exists ((|v_ULTIMATE.start_cstrncat_~d~0#1.base_337| Int) (|v_#memory_int_477| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_337|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (not (= (select (select |v_#memory_int_477| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |#memory_int| (store |v_#memory_int_477| |v_ULTIMATE.start_cstrncat_~d~0#1.base_337| (store (select |v_#memory_int_477| |v_ULTIMATE.start_cstrncat_~d~0#1.base_337|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_337|)) (select (select |v_#memory_int_477| |ULTIMATE.start_cstrncat_~s~0#1.base|) 0)))) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_337|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_337|)))) (= (select |#valid| |ULTIMATE.start_cstrncat_~s~0#1.base|) 1))' at error location [2024-11-14 03:07:16,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:07:16,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:07:16,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30, 30] total 82 [2024-11-14 03:07:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420861973] [2024-11-14 03:07:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:07:16,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 03:07:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:07:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 03:07:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=8771, Unknown=1, NotChecked=0, Total=9506 [2024-11-14 03:07:16,830 INFO L87 Difference]: Start difference. First operand 426 states and 495 transitions. Second operand has 83 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 83 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:07:24,625 WARN L851 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main_~n~0#1|) (or (forall ((v_ArrVal_1167 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1167) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) (and (<= (+ 9 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (<= 0 (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))) is different from false [2024-11-14 03:07:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:07:48,285 INFO L93 Difference]: Finished difference Result 846 states and 938 transitions. [2024-11-14 03:07:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 03:07:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 83 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-14 03:07:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:07:48,288 INFO L225 Difference]: With dead ends: 846 [2024-11-14 03:07:48,289 INFO L226 Difference]: Without dead ends: 796 [2024-11-14 03:07:48,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 155 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8075 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=1911, Invalid=22271, Unknown=2, NotChecked=308, Total=24492 [2024-11-14 03:07:48,290 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 549 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 4730 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 4906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:07:48,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1021 Invalid, 4906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4730 Invalid, 0 Unknown, 81 Unchecked, 14.4s Time] [2024-11-14 03:07:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-14 03:07:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 467. [2024-11-14 03:07:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 463 states have (on average 1.1663066954643628) internal successors, (540), 466 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:07:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 540 transitions. [2024-11-14 03:07:48,303 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 540 transitions. Word has length 47 [2024-11-14 03:07:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:07:48,304 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 540 transitions. [2024-11-14 03:07:48,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 83 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:07:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 540 transitions. [2024-11-14 03:07:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:07:48,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:07:48,305 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:07:48,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-14 03:07:48,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:07:48,507 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:07:48,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:07:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash 670192777, now seen corresponding path program 7 times [2024-11-14 03:07:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:07:48,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499719687] [2024-11-14 03:07:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:07:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:07:49,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:07:49,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499719687] [2024-11-14 03:07:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499719687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:07:49,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265451320] [2024-11-14 03:07:49,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:07:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:07:49,860 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:07:49,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 03:07:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:50,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 03:07:50,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:07:50,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:07:50,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:07:51,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:07:51,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 03:07:51,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 03:07:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:07:51,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:07:51,771 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1237 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1237) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2024-11-14 03:07:52,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:07:52,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:07:52,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:07:52,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 03:07:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 6 not checked. [2024-11-14 03:07:53,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265451320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:07:53,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736030836] [2024-11-14 03:07:53,175 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-14 03:07:53,175 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:07:53,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:07:53,176 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:07:53,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:07:54,004 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:07:59,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20356#(and (exists ((|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_158| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_157| Int)) (and (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_157|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_158|) (<= 2 |ULTIMATE.start_cstrncat_~d~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_157|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_158|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncat_~d~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|))) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:07:59,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:07:59,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:07:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2024-11-14 03:07:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193854265] [2024-11-14 03:07:59,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:07:59,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 03:07:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:07:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 03:07:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2665, Unknown=33, NotChecked=104, Total=2970 [2024-11-14 03:07:59,645 INFO L87 Difference]: Start difference. First operand 467 states and 540 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:08:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:08:07,181 INFO L93 Difference]: Finished difference Result 796 states and 892 transitions. [2024-11-14 03:08:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 03:08:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-14 03:08:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:08:07,184 INFO L225 Difference]: With dead ends: 796 [2024-11-14 03:08:07,184 INFO L226 Difference]: Without dead ends: 575 [2024-11-14 03:08:07,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=474, Invalid=7152, Unknown=34, NotChecked=172, Total=7832 [2024-11-14 03:08:07,185 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:08:07,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 262 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1072 Invalid, 0 Unknown, 119 Unchecked, 3.0s Time] [2024-11-14 03:08:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-14 03:08:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 544. [2024-11-14 03:08:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 540 states have (on average 1.1648148148148147) internal successors, (629), 543 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:08:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 629 transitions. [2024-11-14 03:08:07,197 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 629 transitions. Word has length 47 [2024-11-14 03:08:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:08:07,197 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 629 transitions. [2024-11-14 03:08:07,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:08:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 629 transitions. [2024-11-14 03:08:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:08:07,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:08:07,199 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:08:07,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-14 03:08:07,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:08:07,399 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-14 03:08:07,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:08:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash 634416309, now seen corresponding path program 4 times [2024-11-14 03:08:07,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:08:07,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612126001] [2024-11-14 03:08:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:08:07,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:08:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:08:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:08:11,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:08:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612126001] [2024-11-14 03:08:11,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612126001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:08:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926269359] [2024-11-14 03:08:11,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:08:11,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:08:11,720 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:08:11,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5942665-9b93-498d-b5c1-af216f716554/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:08:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:08:11,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-14 03:08:11,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:08:12,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:08:15,161 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 17 treesize of output 13 [2024-11-14 03:08:15,499 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 22 treesize of output 17 [2024-11-14 03:08:47,114 INFO L349 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2024-11-14 03:08:47,115 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 51 treesize of output 47 [2024-11-14 03:08:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 88 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:08:48,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:08:53,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:08:53,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 63 [2024-11-14 03:08:53,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:08:53,272 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 115 treesize of output 121 [2024-11-14 03:08:53,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:08:53,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 29 [2024-11-14 03:08:59,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 03:08:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:08:59,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926269359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:08:59,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679432119] [2024-11-14 03:08:59,973 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:08:59,973 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:08:59,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:08:59,974 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:08:59,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:09:00,657 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:09:13,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22156#(and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|v_#memory_int_537| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncat_~d~0#1.base_372| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.base_165| Int) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| Int)) (and (not (= (select (select |v_#memory_int_537| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_165|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|) 0)) (<= 1 (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_372|)) (<= 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.base_165|) (= |#memory_int| (store |v_#memory_int_537| |v_ULTIMATE.start_cstrncat_~d~0#1.base_372| (store (select |v_#memory_int_537| |v_ULTIMATE.start_cstrncat_~d~0#1.base_372|) (+ (- 1) (select |#length| |v_ULTIMATE.start_cstrncat_~d~0#1.base_372|)) (select (select |v_#memory_int_537| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_165|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|)))) (<= 2 |v_ULTIMATE.start_cstrncat_~d~0#1.base_372|) (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|) (= (select |#valid| |v_ULTIMATE.start_cstrncat_~d~0#1.base_372|) 1) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| 1) (select |#length| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_165|)) (= (select |#valid| |v_ULTIMATE.start_cstrncat_#t~post4#1.base_165|) 1))) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= (mod |ULTIMATE.start_cstrncat_~n#1| 4294967296) 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~dst#1.base|) (<= 2 |ULTIMATE.start_cstrncat_~s~0#1.base|) (= |ULTIMATE.start_cstrncat_~dst#1.offset| 0))' at error location [2024-11-14 03:09:13,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:09:13,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:09:13,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2024-11-14 03:09:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779268856] [2024-11-14 03:09:13,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:09:13,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 03:09:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:09:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 03:09:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=8723, Unknown=15, NotChecked=0, Total=9312 [2024-11-14 03:09:13,623 INFO L87 Difference]: Start difference. First operand 544 states and 629 transitions. Second operand has 81 states, 81 states have (on average 1.8148148148148149) internal successors, (147), 80 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:09:29,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:09:35,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:09:44,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:09:52,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:01,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:09,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:11,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:22,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:24,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:35,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:37,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:39,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:50,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:54,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:10:56,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:11:08,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:11:10,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:11:12,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:11:14,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]