./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/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_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/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_f90c2674-1f86-4fd8-b140-2796f8effdd1/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 dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:42:00,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:42:00,690 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 02:42:00,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:42:00,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:42:00,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:42:00,741 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:42:00,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:42:00,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:42:00,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:42:00,743 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:42:00,744 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:42:00,744 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:42:00,744 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:42:00,744 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:42:00,744 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:42:00,745 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:42:00,745 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:42:00,745 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:42:00,745 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:42:00,745 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:42:00,746 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:42:00,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 02:42:00,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 02:42:00,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:42:00,747 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:42:00,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:42:00,748 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:42:00,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:42:00,748 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 02:42:00,748 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 02:42:00,749 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:42:00,750 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:42:00,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:42:00,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:42:00,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:42:00,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:00,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:42:00,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:42:00,751 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:42:00,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:42:00,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:42:00,752 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:42:00,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:42:00,752 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_f90c2674-1f86-4fd8-b140-2796f8effdd1/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 -> dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 [2024-11-14 02:42:01,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:42:01,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:42:01,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:42:01,208 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:42:01,208 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:42:01,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i Unable to find full path for "g++" [2024-11-14 02:42:03,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:42:03,641 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:42:03,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2024-11-14 02:42:03,662 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/data/304102988/0a6b9f2752b140da8f08dead7548e048/FLAGebce9b429 [2024-11-14 02:42:03,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/data/304102988/0a6b9f2752b140da8f08dead7548e048 [2024-11-14 02:42:03,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:42:03,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:42:03,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:03,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:42:03,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:42:03,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:03" (1/1) ... [2024-11-14 02:42:03,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5a77dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:03, skipping insertion in model container [2024-11-14 02:42:03,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:03" (1/1) ... [2024-11-14 02:42:03,734 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:42:04,094 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 02:42:04,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:04,112 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:42:04,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:04,202 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:42:04,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04 WrapperNode [2024-11-14 02:42:04,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:04,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:04,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:42:04,204 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:42:04,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,250 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-11-14 02:42:04,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:04,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:42:04,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:42:04,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:42:04,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,280 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,288 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:42:04,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:42:04,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:42:04,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:42:04,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:04,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:42:04,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:42:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:42:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:42:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:42:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:42:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:42:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:42:04,498 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:42:04,500 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:42:04,679 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-14 02:42:04,679 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:42:04,766 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:42:04,767 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 02:42:04,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:04 BoogieIcfgContainer [2024-11-14 02:42:04,767 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:42:04,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:42:04,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:42:04,774 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:42:04,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:42:03" (1/3) ... [2024-11-14 02:42:04,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e69e088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:04, skipping insertion in model container [2024-11-14 02:42:04,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (2/3) ... [2024-11-14 02:42:04,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e69e088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:04, skipping insertion in model container [2024-11-14 02:42:04,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:04" (3/3) ... [2024-11-14 02:42:04,778 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2024-11-14 02:42:04,795 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:42:04,797 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrlen-alloca-1.i that has 1 procedures, 16 locations, 1 initial locations, 2 loop locations, and 7 error locations. [2024-11-14 02:42:04,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:42:04,857 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;@6011591e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:42:04,859 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-14 02:42:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 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 02:42:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:42:04,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:04,871 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:42:04,872 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:04,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash 86075, now seen corresponding path program 1 times [2024-11-14 02:42:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:04,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717691610] [2024-11-14 02:42:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,120 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 02:42:05,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717691610] [2024-11-14 02:42:05,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717691610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:05,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:42:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781128796] [2024-11-14 02:42:05,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:05,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:42:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:42:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:42:05,165 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 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) 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 02:42:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:05,250 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2024-11-14 02:42:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:42:05,255 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 02:42:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:05,262 INFO L225 Difference]: With dead ends: 14 [2024-11-14 02:42:05,263 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:42:05,265 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 02:42:05,270 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:05,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:42:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 02:42:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-14 02:42:05,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2024-11-14 02:42:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:05,314 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-14 02:42:05,314 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 02:42:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-14 02:42:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:42:05,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:05,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:42:05,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:42:05,318 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:05,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 86076, now seen corresponding path program 1 times [2024-11-14 02:42:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412783005] [2024-11-14 02:42:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,803 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 02:42:05,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412783005] [2024-11-14 02:42:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412783005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741386658] [2024-11-14 02:42:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:05,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:05,806 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:05,915 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2024-11-14 02:42:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 02:42:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:05,916 INFO L225 Difference]: With dead ends: 15 [2024-11-14 02:42:05,916 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 02:42:05,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:42:05,917 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:05,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 02:42:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 02:42:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 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 02:42:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-14 02:42:05,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2024-11-14 02:42:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:05,923 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-14 02:42:05,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-14 02:42:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:42:05,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:05,924 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:42:05,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:42:05,924 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:05,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 87417, now seen corresponding path program 1 times [2024-11-14 02:42:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:05,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235197795] [2024-11-14 02:42:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:06,211 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 02:42:06,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235197795] [2024-11-14 02:42:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235197795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:06,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323553567] [2024-11-14 02:42:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:06,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:06,213 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:06,258 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2024-11-14 02:42:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:42:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 02:42:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:06,260 INFO L225 Difference]: With dead ends: 14 [2024-11-14 02:42:06,260 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 02:42:06,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:06,261 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:06,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 02:42:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-14 02:42:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-14 02:42:06,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2024-11-14 02:42:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:06,264 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-14 02:42:06,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-14 02:42:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 02:42:06,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:06,265 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 02:42:06,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:42:06,265 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:06,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2710736, now seen corresponding path program 1 times [2024-11-14 02:42:06,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:06,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361626289] [2024-11-14 02:42:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:06,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:06,330 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 02:42:06,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361626289] [2024-11-14 02:42:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361626289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:06,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419425741] [2024-11-14 02:42:06,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:06,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:42:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:42:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:42:06,334 INFO L87 Difference]: Start difference. First operand 14 states and 16 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 02:42:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:06,366 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2024-11-14 02:42:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:42:06,367 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 02:42:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:06,367 INFO L225 Difference]: With dead ends: 13 [2024-11-14 02:42:06,367 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:42:06,367 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 02:42:06,369 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:06,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:42:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 02:42:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-14 02:42:06,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2024-11-14 02:42:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:06,376 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-14 02:42:06,376 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 02:42:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-14 02:42:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 02:42:06,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:06,376 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 02:42:06,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:42:06,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:06,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2710737, now seen corresponding path program 1 times [2024-11-14 02:42:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:06,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334498141] [2024-11-14 02:42:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:06,491 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 02:42:06,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334498141] [2024-11-14 02:42:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334498141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:06,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736180702] [2024-11-14 02:42:06,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:06,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:06,495 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:06,531 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-14 02:42:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 02:42:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:06,532 INFO L225 Difference]: With dead ends: 16 [2024-11-14 02:42:06,532 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 02:42:06,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:06,533 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:06,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 02:42:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2024-11-14 02:42:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-14 02:42:06,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2024-11-14 02:42:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:06,540 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-14 02:42:06,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-14 02:42:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:42:06,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:06,540 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 02:42:06,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:42:06,541 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:06,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 82752257, now seen corresponding path program 1 times [2024-11-14 02:42:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:06,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729333935] [2024-11-14 02:42:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:06,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:06,967 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 02:42:06,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729333935] [2024-11-14 02:42:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729333935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076695368] [2024-11-14 02:42:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:06,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:06,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:42:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:07,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 02:42:07,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:07,161 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 02:42:07,327 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 02:42:07,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:07,531 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 02:42:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076695368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295846] [2024-11-14 02:42:07,556 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 02:42:07,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:07,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:07,569 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:07,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:07,969 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:08,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215#(exists ((|v_ULTIMATE.start_main_~nondetString1~0#1.base_27| Int) (|v_ULTIMATE.start_main_~i~0#1_35| Int)) (and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet6#1|)) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_27|) (<= |ULTIMATE.start_main_#t~nondet6#1| 127) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_27|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_~length1~0#1|)))' at error location [2024-11-14 02:42:08,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:08,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 02:42:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289515452] [2024-11-14 02:42:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:08,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 02:42:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 02:42:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:42:08,179 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:08,369 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2024-11-14 02:42:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:42:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 02:42:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:08,370 INFO L225 Difference]: With dead ends: 14 [2024-11-14 02:42:08,370 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 02:42:08,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-14 02:42:08,371 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:08,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 02:42:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2024-11-14 02:42:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-14 02:42:08,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2024-11-14 02:42:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:08,376 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-14 02:42:08,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-14 02:42:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:42:08,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:08,378 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 02:42:08,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:08,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 02:42:08,583 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:08,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1689949686, now seen corresponding path program 1 times [2024-11-14 02:42:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:08,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20699598] [2024-11-14 02:42:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:08,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:08,795 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 02:42:08,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:08,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20699598] [2024-11-14 02:42:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20699598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:08,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:42:08,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463298039] [2024-11-14 02:42:08,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:08,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:42:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:42:08,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:42:08,798 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:08,885 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-14 02:42:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:42:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 02:42:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:08,887 INFO L225 Difference]: With dead ends: 17 [2024-11-14 02:42:08,887 INFO L226 Difference]: Without dead ends: 17 [2024-11-14 02:42:08,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:42:08,888 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:08,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-14 02:42:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2024-11-14 02:42:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 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 02:42:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-14 02:42:08,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2024-11-14 02:42:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:08,892 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-14 02:42:08,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-14 02:42:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:42:08,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:08,894 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:08,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 02:42:08,894 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:08,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash -848833968, now seen corresponding path program 1 times [2024-11-14 02:42:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:08,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013525439] [2024-11-14 02:42:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,059 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 02:42:09,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013525439] [2024-11-14 02:42:09,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013525439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:09,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:09,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208318520] [2024-11-14 02:42:09,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:09,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:09,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:09,061 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 02:42:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:09,085 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2024-11-14 02:42:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 02:42:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:09,086 INFO L225 Difference]: With dead ends: 14 [2024-11-14 02:42:09,086 INFO L226 Difference]: Without dead ends: 9 [2024-11-14 02:42:09,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:09,087 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:09,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-14 02:42:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-14 02:42:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 02:42:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2024-11-14 02:42:09,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2024-11-14 02:42:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:09,090 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2024-11-14 02:42:09,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 02:42:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2024-11-14 02:42:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:42:09,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:09,091 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:09,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 02:42:09,091 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:09,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1987877, now seen corresponding path program 1 times [2024-11-14 02:42:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:09,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577115096] [2024-11-14 02:42:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,394 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 02:42:09,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577115096] [2024-11-14 02:42:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577115096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199128539] [2024-11-14 02:42:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:09,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:09,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:09,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:42:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 02:42:09,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:09,688 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 02:42:09,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:09,841 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 02:42:09,894 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 02:42:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199128539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748903478] [2024-11-14 02:42:09,897 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:09,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:09,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:09,899 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:09,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:10,350 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:10,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '372#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:10,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:10,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-14 02:42:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522277307] [2024-11-14 02:42:10,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:10,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 02:42:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:10,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 02:42:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:42:10,569 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:10,657 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2024-11-14 02:42:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:42:10,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 02:42:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:10,658 INFO L225 Difference]: With dead ends: 13 [2024-11-14 02:42:10,658 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:42:10,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-14 02:42:10,659 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:10,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:42:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2024-11-14 02:42:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-14 02:42:10,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2024-11-14 02:42:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:10,662 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-14 02:42:10,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-14 02:42:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:42:10,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:10,663 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:10,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:42:10,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:10,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:10,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1910349150, now seen corresponding path program 2 times [2024-11-14 02:42:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173555828] [2024-11-14 02:42:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:10,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:11,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:11,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173555828] [2024-11-14 02:42:11,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173555828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:11,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304913170] [2024-11-14 02:42:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:11,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:11,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:42:11,475 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 02:42:11,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:11,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 02:42:11,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:11,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:11,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:11,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:11,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304913170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075374258] [2024-11-14 02:42:11,699 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:11,699 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:11,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:11,700 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:11,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:12,014 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:12,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '474#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:12,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:12,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:12,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2024-11-14 02:42:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178619340] [2024-11-14 02:42:12,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:12,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:42:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:42:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:42:12,277 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:12,532 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-11-14 02:42:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:42:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 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 02:42:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:12,534 INFO L225 Difference]: With dead ends: 19 [2024-11-14 02:42:12,535 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 02:42:12,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:42:12,536 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:12,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 02:42:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-11-14 02:42:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-14 02:42:12,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2024-11-14 02:42:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:12,538 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-14 02:42:12,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-14 02:42:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 02:42:12,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:12,541 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 02:42:12,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:42:12,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 02:42:12,745 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:12,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1681554695, now seen corresponding path program 3 times [2024-11-14 02:42:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786155273] [2024-11-14 02:42:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:12,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:13,080 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 02:42:13,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786155273] [2024-11-14 02:42:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786155273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:13,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771431028] [2024-11-14 02:42:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:13,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:13,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:13,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:42:13,160 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:13,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:13,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 02:42:13,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:13,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:13,459 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 02:42:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:13,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771431028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:13,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843270687] [2024-11-14 02:42:13,529 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:13,529 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:13,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:13,529 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:13,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:13,902 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:14,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '604#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:14,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:14,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:14,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-14 02:42:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214166913] [2024-11-14 02:42:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:14,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:42:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:42:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:42:14,174 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:14,316 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2024-11-14 02:42:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:42:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 02:42:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:14,317 INFO L225 Difference]: With dead ends: 16 [2024-11-14 02:42:14,317 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 02:42:14,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-14 02:42:14,319 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:14,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 02:42:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-14 02:42:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-14 02:42:14,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2024-11-14 02:42:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:14,322 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-14 02:42:14,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-14 02:42:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:42:14,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:14,323 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2024-11-14 02:42:14,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:42:14,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 02:42:14,524 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:14,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1066359246, now seen corresponding path program 4 times [2024-11-14 02:42:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:14,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634502158] [2024-11-14 02:42:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:14,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:14,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634502158] [2024-11-14 02:42:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634502158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551148107] [2024-11-14 02:42:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:14,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:14,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:42:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:15,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 02:42:15,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:15,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:15,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:15,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:15,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:15,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551148107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:15,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459178019] [2024-11-14 02:42:15,328 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:15,328 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:15,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:15,329 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:15,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:15,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:15,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '739#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:15,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:15,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-11-14 02:42:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163437121] [2024-11-14 02:42:15,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:15,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 02:42:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 02:42:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:42:15,917 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:16,097 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-14 02:42:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:42:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:42:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:16,098 INFO L225 Difference]: With dead ends: 25 [2024-11-14 02:42:16,099 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 02:42:16,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:42:16,100 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:16,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 02:42:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-11-14 02:42:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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 02:42:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-14 02:42:16,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2024-11-14 02:42:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:16,105 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-14 02:42:16,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-14 02:42:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 02:42:16,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:16,105 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2024-11-14 02:42:16,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:42:16,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 02:42:16,306 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:16,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1113998925, now seen corresponding path program 5 times [2024-11-14 02:42:16,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:16,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542489032] [2024-11-14 02:42:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:16,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542489032] [2024-11-14 02:42:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542489032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987106075] [2024-11-14 02:42:16,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:16,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:16,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:16,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:42:16,849 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 02:42:16,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:16,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 02:42:16,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:17,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:17,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:42:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:17,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987106075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:17,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579292378] [2024-11-14 02:42:17,337 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:17,337 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:17,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:17,338 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:17,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:17,656 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:17,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '906#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:17,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:17,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2024-11-14 02:42:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148423673] [2024-11-14 02:42:17,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:17,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 02:42:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 02:42:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-11-14 02:42:17,955 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 02:42:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:18,124 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2024-11-14 02:42:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:42:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 02:42:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:18,125 INFO L225 Difference]: With dead ends: 20 [2024-11-14 02:42:18,125 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 02:42:18,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2024-11-14 02:42:18,127 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:18,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 02:42:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-11-14 02:42:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-14 02:42:18,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2024-11-14 02:42:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:18,134 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-14 02:42:18,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 02:42:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-14 02:42:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:42:18,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:18,135 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2024-11-14 02:42:18,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:18,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 02:42:18,336 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:18,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1106109574, now seen corresponding path program 6 times [2024-11-14 02:42:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:18,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124080513] [2024-11-14 02:42:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:18,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124080513] [2024-11-14 02:42:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124080513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784433808] [2024-11-14 02:42:18,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:18,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:18,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:18,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:18,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:42:18,967 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:18,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:18,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 02:42:18,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:19,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:19,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:19,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:19,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784433808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629442946] [2024-11-14 02:42:19,403 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:19,404 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:19,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:19,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:19,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:19,674 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:20,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1076#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:20,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:20,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-14 02:42:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901892817] [2024-11-14 02:42:20,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:20,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 02:42:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 02:42:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:42:20,341 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:20,620 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-14 02:42:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:42:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 02:42:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:20,621 INFO L225 Difference]: With dead ends: 31 [2024-11-14 02:42:20,621 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 02:42:20,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2024-11-14 02:42:20,622 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:20,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 02:42:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-14 02:42:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-14 02:42:20,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2024-11-14 02:42:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:20,627 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-14 02:42:20,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-14 02:42:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 02:42:20,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:20,627 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-11-14 02:42:20,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:20,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:42:20,831 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:20,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1852834015, now seen corresponding path program 7 times [2024-11-14 02:42:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:20,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762519611] [2024-11-14 02:42:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:21,244 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 02:42:21,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:21,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762519611] [2024-11-14 02:42:21,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762519611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:21,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437167239] [2024-11-14 02:42:21,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:21,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:21,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:21,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:42:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:21,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 02:42:21,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:21,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:21,805 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 02:42:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:21,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437167239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:21,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35306309] [2024-11-14 02:42:21,902 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:21,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:21,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:21,902 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:21,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:22,161 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:22,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1280#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:22,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:22,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2024-11-14 02:42:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411439104] [2024-11-14 02:42:22,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:22,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 02:42:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 02:42:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-11-14 02:42:22,487 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:22,719 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-14 02:42:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 02:42:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 02:42:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:22,720 INFO L225 Difference]: With dead ends: 24 [2024-11-14 02:42:22,720 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:42:22,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2024-11-14 02:42:22,722 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:22,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:42:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-14 02:42:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-14 02:42:22,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2024-11-14 02:42:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:22,729 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-14 02:42:22,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-14 02:42:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:42:22,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:22,730 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2024-11-14 02:42:22,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:42:22,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 02:42:22,931 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:22,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1837938778, now seen corresponding path program 8 times [2024-11-14 02:42:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:22,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074496227] [2024-11-14 02:42:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:22,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:23,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074496227] [2024-11-14 02:42:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074496227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442510686] [2024-11-14 02:42:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:23,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:42:23,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 02:42:23,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:23,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 02:42:23,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:23,680 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 02:42:24,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:42:24,151 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 19 [2024-11-14 02:42:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:24,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:24,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 02:42:24,873 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 15 treesize of output 11 [2024-11-14 02:42:24,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 02:42:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:24,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442510686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:24,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483874171] [2024-11-14 02:42:24,989 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:24,989 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:24,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:24,989 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:24,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:25,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:25,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1494#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:25,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:25,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:25,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2024-11-14 02:42:25,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665491778] [2024-11-14 02:42:25,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:25,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 02:42:25,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 02:42:25,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 02:42:25,684 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:27,244 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-14 02:42:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 02:42:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 02:42:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:27,245 INFO L225 Difference]: With dead ends: 40 [2024-11-14 02:42:27,245 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 02:42:27,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 02:42:27,247 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:27,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:42:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 02:42:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 02:42:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-14 02:42:27,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2024-11-14 02:42:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:27,249 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-14 02:42:27,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-14 02:42:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 02:42:27,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:27,250 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2024-11-14 02:42:27,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 02:42:27,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 02:42:27,454 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:27,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash 885817774, now seen corresponding path program 9 times [2024-11-14 02:42:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:27,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276960628] [2024-11-14 02:42:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:27,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:27,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276960628] [2024-11-14 02:42:27,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276960628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:27,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739611372] [2024-11-14 02:42:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:27,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:27,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:27,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:42:28,122 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:28,122 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:28,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 02:42:28,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:28,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:28,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:28,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:28,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739611372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432282120] [2024-11-14 02:42:28,578 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:28,578 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:28,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:28,578 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:28,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:28,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:29,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1774#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:29,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:29,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:29,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2024-11-14 02:42:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491986736] [2024-11-14 02:42:29,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:29,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 02:42:29,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 02:42:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 02:42:29,402 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:30,017 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-11-14 02:42:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 02:42:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 02:42:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:30,018 INFO L225 Difference]: With dead ends: 43 [2024-11-14 02:42:30,018 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 02:42:30,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 02:42:30,019 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:30,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:42:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 02:42:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-14 02:42:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-14 02:42:30,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2024-11-14 02:42:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:30,022 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-14 02:42:30,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-14 02:42:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 02:42:30,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:30,023 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2024-11-14 02:42:30,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 02:42:30,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 02:42:30,227 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:30,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2065944905, now seen corresponding path program 10 times [2024-11-14 02:42:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610312605] [2024-11-14 02:42:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:30,706 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 02:42:30,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610312605] [2024-11-14 02:42:30,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610312605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172484247] [2024-11-14 02:42:30,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:30,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:30,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:30,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:30,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:42:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:30,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 02:42:30,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:30,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:31,264 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 02:42:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:31,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172484247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917589524] [2024-11-14 02:42:31,394 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:31,394 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:31,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:31,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:31,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:31,594 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:31,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2058#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:31,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:31,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:31,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2024-11-14 02:42:31,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785496012] [2024-11-14 02:42:31,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:31,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 02:42:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 02:42:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 02:42:31,983 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 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 02:42:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:32,272 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-11-14 02:42:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 02:42:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 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 28 [2024-11-14 02:42:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:32,273 INFO L225 Difference]: With dead ends: 32 [2024-11-14 02:42:32,273 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 02:42:32,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 02:42:32,274 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:32,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:42:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 02:42:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-14 02:42:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-11-14 02:42:32,279 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2024-11-14 02:42:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:32,279 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-11-14 02:42:32,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 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 02:42:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-11-14 02:42:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 02:42:32,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:32,280 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2024-11-14 02:42:32,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:42:32,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:32,480 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:32,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1098162306, now seen corresponding path program 11 times [2024-11-14 02:42:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051017890] [2024-11-14 02:42:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:33,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051017890] [2024-11-14 02:42:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051017890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294801848] [2024-11-14 02:42:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:33,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:33,096 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:33,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:42:33,223 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 02:42:33,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:33,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 02:42:33,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:33,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:33,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:33,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294801848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506201778] [2024-11-14 02:42:33,704 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:33,704 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:33,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:33,705 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:33,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:33,899 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:34,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2333#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:34,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:34,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2024-11-14 02:42:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478479036] [2024-11-14 02:42:34,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:34,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 02:42:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 02:42:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 02:42:34,379 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:34,922 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-11-14 02:42:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 02:42:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-14 02:42:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:34,923 INFO L225 Difference]: With dead ends: 49 [2024-11-14 02:42:34,923 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 02:42:34,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 02:42:34,924 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:34,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:42:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 02:42:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-14 02:42:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-14 02:42:34,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2024-11-14 02:42:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:34,930 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-14 02:42:34,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-14 02:42:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 02:42:34,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:34,931 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2024-11-14 02:42:34,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 02:42:35,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:35,131 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:35,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -434853219, now seen corresponding path program 12 times [2024-11-14 02:42:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426063313] [2024-11-14 02:42:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:35,809 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 02:42:35,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:35,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426063313] [2024-11-14 02:42:35,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426063313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:35,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931001549] [2024-11-14 02:42:35,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:35,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:35,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:35,812 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:35,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 02:42:35,932 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:35,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:35,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 02:42:35,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:36,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:36,623 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 21 treesize of output 17 [2024-11-14 02:42:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:36,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931001549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94360372] [2024-11-14 02:42:36,990 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:36,990 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:36,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:36,990 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:36,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:37,201 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:37,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2663#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:37,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:37,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:37,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-14 02:42:37,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997012656] [2024-11-14 02:42:37,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:37,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 02:42:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 02:42:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 02:42:37,822 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:38,303 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-14 02:42:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 02:42:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:42:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:38,304 INFO L225 Difference]: With dead ends: 36 [2024-11-14 02:42:38,304 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:42:38,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 02:42:38,305 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:38,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:42:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:42:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-14 02:42:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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 02:42:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-11-14 02:42:38,308 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2024-11-14 02:42:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:38,308 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-11-14 02:42:38,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-11-14 02:42:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 02:42:38,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:38,309 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2024-11-14 02:42:38,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:38,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:38,513 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:38,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1282116394, now seen corresponding path program 13 times [2024-11-14 02:42:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:38,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309272427] [2024-11-14 02:42:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:38,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:39,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309272427] [2024-11-14 02:42:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309272427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460295957] [2024-11-14 02:42:39,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:39,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:39,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:39,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:39,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 02:42:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:39,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 02:42:39,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:39,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:39,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:39,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:39,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460295957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996316718] [2024-11-14 02:42:39,789 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:39,789 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:39,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:39,789 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:39,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:39,968 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:40,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2973#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:40,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:40,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2024-11-14 02:42:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847520263] [2024-11-14 02:42:40,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:40,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 02:42:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 02:42:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 02:42:40,637 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:41,360 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-14 02:42:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 02:42:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 02:42:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:41,361 INFO L225 Difference]: With dead ends: 55 [2024-11-14 02:42:41,361 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 02:42:41,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 02:42:41,362 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:41,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:42:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 02:42:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-14 02:42:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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 02:42:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-14 02:42:41,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2024-11-14 02:42:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:41,365 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-14 02:42:41,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-14 02:42:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 02:42:41,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:41,369 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1] [2024-11-14 02:42:41,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 02:42:41,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 02:42:41,573 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:41,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1768162959, now seen corresponding path program 14 times [2024-11-14 02:42:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991525592] [2024-11-14 02:42:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:42,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991525592] [2024-11-14 02:42:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991525592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669538336] [2024-11-14 02:42:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:42,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:42,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 02:42:42,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 02:42:42,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:42,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 02:42:42,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:43,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:43,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:42:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669538336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:43,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650691852] [2024-11-14 02:42:43,742 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:43,742 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:43,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:43,743 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:43,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:43,922 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:44,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3345#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:44,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:44,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:44,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2024-11-14 02:42:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395069186] [2024-11-14 02:42:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:44,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 02:42:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 02:42:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2461, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 02:42:44,457 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 49 states, 48 states have (on average 1.875) internal successors, (90), 48 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 02:42:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:44,735 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-14 02:42:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 02:42:44,736 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.875) internal successors, (90), 48 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 02:42:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:44,736 INFO L225 Difference]: With dead ends: 40 [2024-11-14 02:42:44,736 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 02:42:44,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=420, Invalid=2550, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 02:42:44,738 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:44,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 02:42:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-14 02:42:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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 02:42:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-11-14 02:42:44,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2024-11-14 02:42:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:44,747 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-11-14 02:42:44,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.875) internal successors, (90), 48 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 02:42:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-11-14 02:42:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 02:42:44,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:44,747 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2024-11-14 02:42:44,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 02:42:44,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 02:42:44,949 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:44,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1602444970, now seen corresponding path program 15 times [2024-11-14 02:42:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:44,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356629861] [2024-11-14 02:42:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:45,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356629861] [2024-11-14 02:42:45,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356629861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:45,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831126837] [2024-11-14 02:42:45,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:45,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:45,701 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:45,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 02:42:45,933 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:45,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 02:42:45,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:46,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:46,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:46,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:46,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831126837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109055650] [2024-11-14 02:42:46,533 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:46,533 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:46,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:46,533 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:46,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:46,671 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:47,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3690#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:47,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:47,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:47,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2024-11-14 02:42:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997319280] [2024-11-14 02:42:47,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:47,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 02:42:47,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 02:42:47,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 02:42:47,261 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 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 02:42:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:47,973 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-14 02:42:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 02:42:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 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 38 [2024-11-14 02:42:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:47,974 INFO L225 Difference]: With dead ends: 61 [2024-11-14 02:42:47,974 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 02:42:47,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=2390, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 02:42:47,975 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:47,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:42:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 02:42:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-14 02:42:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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 02:42:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-11-14 02:42:47,978 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2024-11-14 02:42:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:47,978 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-11-14 02:42:47,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 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 02:42:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-11-14 02:42:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 02:42:47,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:47,979 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1] [2024-11-14 02:42:47,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:48,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:48,180 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:48,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1280238139, now seen corresponding path program 16 times [2024-11-14 02:42:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829489949] [2024-11-14 02:42:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:49,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829489949] [2024-11-14 02:42:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829489949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464782072] [2024-11-14 02:42:49,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:49,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:49,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 02:42:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:49,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 02:42:49,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:49,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:50,120 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 02:42:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:50,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464782072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193540572] [2024-11-14 02:42:50,375 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:50,375 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:50,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:50,376 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:50,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:50,563 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:51,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4094#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:51,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:51,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2024-11-14 02:42:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952951124] [2024-11-14 02:42:51,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:51,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 02:42:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 02:42:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 02:42:51,221 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:51,639 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-11-14 02:42:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 02:42:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 02:42:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:51,640 INFO L225 Difference]: With dead ends: 44 [2024-11-14 02:42:51,640 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 02:42:51,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 71 SyntacticMatches, 19 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 02:42:51,641 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:51,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:42:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 02:42:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-14 02:42:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-14 02:42:51,645 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2024-11-14 02:42:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:51,645 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-14 02:42:51,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-14 02:42:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 02:42:51,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:51,646 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2024-11-14 02:42:51,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 02:42:51,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:51,847 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:51,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1948205570, now seen corresponding path program 17 times [2024-11-14 02:42:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:51,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218136376] [2024-11-14 02:42:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:51,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:52,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218136376] [2024-11-14 02:42:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218136376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012204980] [2024-11-14 02:42:52,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:52,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:52,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:52,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 02:42:52,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 02:42:52,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:52,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 02:42:52,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:53,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:42:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:53,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:53,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:42:53,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:42:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:53,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012204980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468080484] [2024-11-14 02:42:53,406 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:53,406 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:53,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:53,406 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:53,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:53,554 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:54,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4474#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:54,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:54,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:54,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2024-11-14 02:42:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059787679] [2024-11-14 02:42:54,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:54,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 02:42:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 02:42:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1862, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 02:42:54,243 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:55,130 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-11-14 02:42:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 02:42:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 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 42 [2024-11-14 02:42:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:55,131 INFO L225 Difference]: With dead ends: 67 [2024-11-14 02:42:55,131 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 02:42:55,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=2798, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 02:42:55,132 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:55,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:42:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 02:42:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-14 02:42:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 02:42:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-14 02:42:55,135 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2024-11-14 02:42:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:55,135 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-14 02:42:55,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-14 02:42:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 02:42:55,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:55,136 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2024-11-14 02:42:55,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:55,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:55,337 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:55,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2037155943, now seen corresponding path program 18 times [2024-11-14 02:42:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367246090] [2024-11-14 02:42:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:56,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:56,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367246090] [2024-11-14 02:42:56,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367246090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:56,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812947726] [2024-11-14 02:42:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:56,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:56,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:56,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 02:42:56,430 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:56,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:56,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 02:42:56,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:56,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:57,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:42:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812947726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978474064] [2024-11-14 02:42:57,664 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:57,664 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:57,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:57,664 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:57,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:57,816 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:58,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4927#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:42:58,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:58,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2024-11-14 02:42:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400182109] [2024-11-14 02:42:58,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:58,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 02:42:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 02:42:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=3403, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 02:42:58,527 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:58,977 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-14 02:42:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 02:42:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:42:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:58,978 INFO L225 Difference]: With dead ends: 48 [2024-11-14 02:42:58,978 INFO L226 Difference]: Without dead ends: 48 [2024-11-14 02:42:58,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=537, Invalid=3495, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 02:42:58,979 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:58,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:42:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-14 02:42:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-11-14 02:42:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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 02:42:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-11-14 02:42:58,982 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2024-11-14 02:42:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:58,982 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-11-14 02:42:58,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-11-14 02:42:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 02:42:58,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:58,983 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2024-11-14 02:42:58,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:59,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:59,184 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:42:59,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash 798225106, now seen corresponding path program 19 times [2024-11-14 02:42:59,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:59,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103806636] [2024-11-14 02:42:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:59,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:00,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:00,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103806636] [2024-11-14 02:43:00,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103806636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396568460] [2024-11-14 02:43:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:43:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:00,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:00,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 02:43:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:00,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 02:43:00,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:00,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:43:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:00,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:00,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:43:00,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:43:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:00,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396568460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:00,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276384483] [2024-11-14 02:43:00,758 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:00,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:00,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:00,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:00,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:00,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:01,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5342#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:43:01,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:01,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:01,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2024-11-14 02:43:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433710955] [2024-11-14 02:43:01,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:01,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 02:43:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 02:43:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 02:43:01,654 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:02,509 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-11-14 02:43:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 02:43:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-14 02:43:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:02,510 INFO L225 Difference]: With dead ends: 73 [2024-11-14 02:43:02,510 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 02:43:02,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=184, Invalid=3238, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 02:43:02,511 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:02,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:43:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 02:43:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-14 02:43:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-14 02:43:02,514 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2024-11-14 02:43:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:02,515 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-14 02:43:02,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-14 02:43:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 02:43:02,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:02,516 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1] [2024-11-14 02:43:02,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 02:43:02,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:02,716 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:43:02,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1194694931, now seen corresponding path program 20 times [2024-11-14 02:43:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559382798] [2024-11-14 02:43:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:03,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559382798] [2024-11-14 02:43:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559382798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111216463] [2024-11-14 02:43:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:43:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:03,580 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:03,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 02:43:03,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 02:43:03,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:43:03,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 02:43:03,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:03,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:43:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:04,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111216463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45875619] [2024-11-14 02:43:05,622 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:05,622 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:05,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:05,622 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:05,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:05,788 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:06,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5849#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:43:06,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:06,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:06,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 74 [2024-11-14 02:43:06,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214583795] [2024-11-14 02:43:06,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:06,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 02:43:06,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 02:43:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=5597, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 02:43:06,601 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 76 states, 75 states have (on average 1.92) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:07,013 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-11-14 02:43:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 02:43:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.92) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-14 02:43:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:07,014 INFO L225 Difference]: With dead ends: 52 [2024-11-14 02:43:07,014 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 02:43:07,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=920, Invalid=5722, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 02:43:07,015 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:07,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:43:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 02:43:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-14 02:43:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-14 02:43:07,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2024-11-14 02:43:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:07,019 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-14 02:43:07,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.92) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-14 02:43:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 02:43:07,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:07,019 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2024-11-14 02:43:07,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 02:43:07,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 02:43:07,220 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:43:07,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1345561306, now seen corresponding path program 21 times [2024-11-14 02:43:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:07,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940413911] [2024-11-14 02:43:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:08,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940413911] [2024-11-14 02:43:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940413911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662109439] [2024-11-14 02:43:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:43:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:08,100 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:08,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 02:43:08,304 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:43:08,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:43:08,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 02:43:08,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:08,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:43:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:08,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:08,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:43:08,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:43:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662109439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847589445] [2024-11-14 02:43:09,047 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:09,047 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:09,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:09,047 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:09,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:09,273 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:10,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6299#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:43:10,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:10,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2024-11-14 02:43:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915637625] [2024-11-14 02:43:10,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:10,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 02:43:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 02:43:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 02:43:10,585 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 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 02:43:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:11,913 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-11-14 02:43:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 02:43:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 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 50 [2024-11-14 02:43:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:11,914 INFO L225 Difference]: With dead ends: 79 [2024-11-14 02:43:11,914 INFO L226 Difference]: Without dead ends: 54 [2024-11-14 02:43:11,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=196, Invalid=3710, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 02:43:11,915 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:11,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:43:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-14 02:43:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-14 02:43:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-14 02:43:11,919 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2024-11-14 02:43:11,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:11,919 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-14 02:43:11,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 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 02:43:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-14 02:43:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 02:43:11,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:11,920 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1] [2024-11-14 02:43:11,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 02:43:12,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 02:43:12,121 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:43:12,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 304434113, now seen corresponding path program 22 times [2024-11-14 02:43:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476580247] [2024-11-14 02:43:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:13,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476580247] [2024-11-14 02:43:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476580247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674188188] [2024-11-14 02:43:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:43:13,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:13,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:13,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 02:43:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:13,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 02:43:13,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:14,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:14,824 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 02:43:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674188188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854460282] [2024-11-14 02:43:15,244 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:15,244 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:15,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:15,244 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:15,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:15,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:16,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6823#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:43:16,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:16,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:16,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2024-11-14 02:43:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476603733] [2024-11-14 02:43:16,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:16,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 02:43:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 02:43:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3343, Unknown=0, NotChecked=0, Total=3782 [2024-11-14 02:43:16,667 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 57 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:17,610 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2024-11-14 02:43:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 02:43:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-14 02:43:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:17,611 INFO L225 Difference]: With dead ends: 56 [2024-11-14 02:43:17,611 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 02:43:17,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 95 SyntacticMatches, 25 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2572 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=466, Invalid=3440, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 02:43:17,612 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:17,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:43:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 02:43:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-14 02:43:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-14 02:43:17,622 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2024-11-14 02:43:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:17,622 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-14 02:43:17,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-14 02:43:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 02:43:17,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:17,627 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2024-11-14 02:43:17,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 02:43:17,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:17,828 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:43:17,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 503405818, now seen corresponding path program 23 times [2024-11-14 02:43:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859245727] [2024-11-14 02:43:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:18,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859245727] [2024-11-14 02:43:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859245727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554014400] [2024-11-14 02:43:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:43:18,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:18,996 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 02:43:19,351 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 02:43:19,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:43:19,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 02:43:19,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:19,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:43:20,131 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 02:43:25,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:43:25,548 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 19 [2024-11-14 02:43:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:25,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:28,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 02:43:28,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 02:43:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:43:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554014400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923647507] [2024-11-14 02:43:29,050 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:29,050 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:29,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:29,050 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:29,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:29,195 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:30,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7346#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:43:30,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:30,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 86 [2024-11-14 02:43:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932800720] [2024-11-14 02:43:30,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:30,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-14 02:43:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-14 02:43:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=7557, Unknown=0, NotChecked=0, Total=8372 [2024-11-14 02:43:30,926 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 87 states, 87 states have (on average 1.8620689655172413) internal successors, (162), 86 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:32,393 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2024-11-14 02:44:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 02:44:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.8620689655172413) internal successors, (162), 86 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-14 02:44:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:32,395 INFO L225 Difference]: With dead ends: 88 [2024-11-14 02:44:32,395 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 02:44:32,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=1622, Invalid=13384, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 02:44:32,397 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:32,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 4 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 02:44:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 02:44:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-11-14 02:44:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-11-14 02:44:32,400 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2024-11-14 02:44:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:32,401 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-11-14 02:44:32,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.8620689655172413) internal successors, (162), 86 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-11-14 02:44:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 02:44:32,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:32,402 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2024-11-14 02:44:32,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-14 02:44:32,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-14 02:44:32,603 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:44:32,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -168668594, now seen corresponding path program 24 times [2024-11-14 02:44:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:32,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075946972] [2024-11-14 02:44:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:32,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:33,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075946972] [2024-11-14 02:44:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075946972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611354365] [2024-11-14 02:44:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:44:33,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:33,975 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:33,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 02:44:34,491 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:44:34,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:34,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 02:44:34,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:35,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:44:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:35,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:35,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:44:35,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:44:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:35,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611354365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:35,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942729994] [2024-11-14 02:44:35,543 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:44:35,543 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:35,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:35,544 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:35,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:35,699 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:37,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7954#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:44:37,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:37,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:37,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2024-11-14 02:44:37,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784293946] [2024-11-14 02:44:37,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:37,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 02:44:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 02:44:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3046, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 02:44:37,146 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:39,054 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2024-11-14 02:44:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 02:44:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-14 02:44:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:39,057 INFO L225 Difference]: With dead ends: 91 [2024-11-14 02:44:39,057 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 02:44:39,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 135 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=220, Invalid=4750, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 02:44:39,058 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:39,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:44:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 02:44:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-11-14 02:44:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 02:44:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-14 02:44:39,064 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2024-11-14 02:44:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:39,064 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-14 02:44:39,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-14 02:44:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-14 02:44:39,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:39,065 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1] [2024-11-14 02:44:39,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 02:44:39,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:39,266 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:44:39,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:39,266 INFO L85 PathProgramCache]: Analyzing trace with hash -454265367, now seen corresponding path program 25 times [2024-11-14 02:44:39,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:39,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381215255] [2024-11-14 02:44:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 144 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:40,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381215255] [2024-11-14 02:44:40,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381215255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658021949] [2024-11-14 02:44:40,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:44:40,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:40,213 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 02:44:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:40,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 02:44:40,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:41,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:42,091 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 02:44:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658021949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65579703] [2024-11-14 02:44:42,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:44:42,645 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:42,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:42,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:42,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:42,808 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:44,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8558#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:44:44,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:44,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:44,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2024-11-14 02:44:44,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287762919] [2024-11-14 02:44:44,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:44,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 02:44:44,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 02:44:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=4269, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 02:44:44,051 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 65 states, 64 states have (on average 1.921875) internal successors, (123), 64 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:44,943 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-14 02:44:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 02:44:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.921875) internal successors, (123), 64 states have internal predecessors, (123), 0 states have call successors, (0), 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 60 [2024-11-14 02:44:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:44,944 INFO L225 Difference]: With dead ends: 64 [2024-11-14 02:44:44,944 INFO L226 Difference]: Without dead ends: 64 [2024-11-14 02:44:44,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 111 SyntacticMatches, 29 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=592, Invalid=4378, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 02:44:44,945 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:44,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:44:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-14 02:44:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-11-14 02:44:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-11-14 02:44:44,948 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2024-11-14 02:44:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:44,948 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-11-14 02:44:44,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.921875) internal successors, (123), 64 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-11-14 02:44:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 02:44:44,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:44,949 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2024-11-14 02:44:44,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 02:44:45,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:45,150 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:44:45,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1537645858, now seen corresponding path program 26 times [2024-11-14 02:44:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:45,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198576555] [2024-11-14 02:44:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:46,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198576555] [2024-11-14 02:44:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198576555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311047075] [2024-11-14 02:44:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:44:46,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:46,506 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:46,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 02:44:46,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 02:44:46,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:46,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-14 02:44:46,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:47,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:44:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:47,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:47,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:44:47,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:44:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:48,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311047075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362957792] [2024-11-14 02:44:48,119 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:44:48,119 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:48,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:48,119 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:48,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:48,316 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:50,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9113#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:44:50,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:50,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2024-11-14 02:44:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721468001] [2024-11-14 02:44:50,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:50,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 02:44:50,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 02:44:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3387, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 02:44:50,150 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:52,312 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2024-11-14 02:44:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 02:44:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 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 62 [2024-11-14 02:44:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:52,313 INFO L225 Difference]: With dead ends: 97 [2024-11-14 02:44:52,313 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 02:44:52,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 145 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=232, Invalid=5318, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 02:44:52,314 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:52,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 02:44:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 02:44:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-14 02:44:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-11-14 02:44:52,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2024-11-14 02:44:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:52,316 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-11-14 02:44:52,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-11-14 02:44:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 02:44:52,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:52,316 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1] [2024-11-14 02:44:52,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 02:44:52,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:52,520 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:44:52,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash 861895485, now seen corresponding path program 27 times [2024-11-14 02:44:52,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:52,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367334254] [2024-11-14 02:44:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:52,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 169 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:54,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367334254] [2024-11-14 02:44:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367334254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220670070] [2024-11-14 02:44:54,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:44:54,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:54,103 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:54,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 02:44:54,453 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:44:54,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:54,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-14 02:44:54,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:55,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:56,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:44:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220670070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:57,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87144840] [2024-11-14 02:44:57,186 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:44:57,186 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:57,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:57,187 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:57,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:57,411 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:59,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9771#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:44:59,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:59,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:59,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 81 [2024-11-14 02:44:59,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015053796] [2024-11-14 02:44:59,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:59,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 02:44:59,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 02:44:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=6658, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 02:44:59,290 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:00,677 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2024-11-14 02:45:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 02:45:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 02:45:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:00,678 INFO L225 Difference]: With dead ends: 68 [2024-11-14 02:45:00,678 INFO L226 Difference]: Without dead ends: 68 [2024-11-14 02:45:00,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 121 SyntacticMatches, 15 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4154 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1047, Invalid=6785, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 02:45:00,679 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:00,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:45:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-14 02:45:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-11-14 02:45:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2024-11-14 02:45:00,681 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2024-11-14 02:45:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:00,682 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2024-11-14 02:45:00,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2024-11-14 02:45:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 02:45:00,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:00,683 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2024-11-14 02:45:00,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 02:45:00,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:00,883 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:45:00,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash -647127690, now seen corresponding path program 28 times [2024-11-14 02:45:00,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234147048] [2024-11-14 02:45:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:02,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234147048] [2024-11-14 02:45:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234147048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390774782] [2024-11-14 02:45:02,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:45:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:02,481 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:02,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 02:45:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:02,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-14 02:45:02,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:03,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:45:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:03,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:03,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:45:03,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:45:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390774782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668077872] [2024-11-14 02:45:03,926 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:45:03,926 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:03,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:03,926 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:03,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:04,078 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:05,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10361#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:45:05,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:05,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:45:05,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 57 [2024-11-14 02:45:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717340265] [2024-11-14 02:45:05,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:05,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 02:45:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 02:45:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3746, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 02:45:05,605 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 58 states, 58 states have (on average 1.793103448275862) internal successors, (104), 57 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:07,649 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2024-11-14 02:45:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 02:45:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.793103448275862) internal successors, (104), 57 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-14 02:45:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:07,650 INFO L225 Difference]: With dead ends: 103 [2024-11-14 02:45:07,650 INFO L226 Difference]: Without dead ends: 70 [2024-11-14 02:45:07,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 155 SyntacticMatches, 16 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=244, Invalid=5918, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 02:45:07,651 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:07,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2737 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 02:45:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-14 02:45:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-14 02:45:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-11-14 02:45:07,654 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2024-11-14 02:45:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:07,654 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-11-14 02:45:07,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.793103448275862) internal successors, (104), 57 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-11-14 02:45:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 02:45:07,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:07,655 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1] [2024-11-14 02:45:07,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 02:45:07,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 02:45:07,855 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:45:07,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1325659665, now seen corresponding path program 29 times [2024-11-14 02:45:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281768050] [2024-11-14 02:45:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:09,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281768050] [2024-11-14 02:45:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281768050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155119168] [2024-11-14 02:45:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:45:09,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:09,428 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:09,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 02:45:09,854 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 02:45:09,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:45:09,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-14 02:45:09,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:11,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:13,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:45:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:13,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155119168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:13,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223995639] [2024-11-14 02:45:13,965 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:45:13,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:13,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:13,965 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:13,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:14,116 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:15,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11061#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:45:15,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:15,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:45:15,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 87 [2024-11-14 02:45:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082216183] [2024-11-14 02:45:15,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:15,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-14 02:45:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-14 02:45:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=7469, Unknown=0, NotChecked=0, Total=8742 [2024-11-14 02:45:15,728 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:16,536 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2024-11-14 02:45:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 02:45:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 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 68 [2024-11-14 02:45:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:16,537 INFO L225 Difference]: With dead ends: 72 [2024-11-14 02:45:16,537 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 02:45:16,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 111 SyntacticMatches, 33 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6224 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1308, Invalid=7622, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 02:45:16,538 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:16,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 02:45:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 02:45:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-14 02:45:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-14 02:45:16,541 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2024-11-14 02:45:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:16,541 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-14 02:45:16,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-14 02:45:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 02:45:16,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:16,542 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2024-11-14 02:45:16,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 02:45:16,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 02:45:16,743 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:45:16,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:16,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1646349494, now seen corresponding path program 30 times [2024-11-14 02:45:16,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:16,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920464799] [2024-11-14 02:45:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:16,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:18,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920464799] [2024-11-14 02:45:18,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920464799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68620214] [2024-11-14 02:45:18,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:45:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:18,475 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:18,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 02:45:19,082 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:45:19,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:45:19,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-14 02:45:19,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:20,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:45:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:20,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:20,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:45:20,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:45:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:20,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68620214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:20,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207725095] [2024-11-14 02:45:20,687 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:45:20,687 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:20,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:20,687 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:20,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:20,893 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:22,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11686#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:45:22,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:22,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:45:22,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 60 [2024-11-14 02:45:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463054852] [2024-11-14 02:45:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:22,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 02:45:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 02:45:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4123, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 02:45:22,868 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:25,160 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2024-11-14 02:45:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 02:45:25,160 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-14 02:45:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:25,161 INFO L225 Difference]: With dead ends: 109 [2024-11-14 02:45:25,161 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 02:45:25,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 165 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=256, Invalid=6550, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 02:45:25,162 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3112 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:25,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3112 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 02:45:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 02:45:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-14 02:45:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-14 02:45:25,165 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2024-11-14 02:45:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:25,166 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-14 02:45:25,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.8032786885245902) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-14 02:45:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 02:45:25,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:25,166 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1] [2024-11-14 02:45:25,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 02:45:25,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 02:45:25,367 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:45:25,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 957433445, now seen corresponding path program 31 times [2024-11-14 02:45:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647092637] [2024-11-14 02:45:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 225 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:27,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:27,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647092637] [2024-11-14 02:45:27,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647092637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:27,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3288210] [2024-11-14 02:45:27,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:45:27,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:27,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:27,422 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:27,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 02:45:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:27,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 02:45:27,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:28,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:29,946 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 02:45:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3288210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455582550] [2024-11-14 02:45:30,640 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:45:30,640 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:30,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:30,641 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:30,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:30,761 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:32,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12410#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:45:32,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:32,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:45:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2024-11-14 02:45:32,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706302406] [2024-11-14 02:45:32,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:32,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 02:45:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 02:45:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=774, Invalid=5868, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 02:45:32,656 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 76 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 02:45:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:34,053 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-11-14 02:45:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 02:45:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 76 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) Word has length 72 [2024-11-14 02:45:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:34,054 INFO L225 Difference]: With dead ends: 76 [2024-11-14 02:45:34,054 INFO L226 Difference]: Without dead ends: 76 [2024-11-14 02:45:34,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 135 SyntacticMatches, 35 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=811, Invalid=5995, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 02:45:34,055 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:34,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:45:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-14 02:45:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-14 02:45:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-11-14 02:45:34,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2024-11-14 02:45:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:34,057 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-11-14 02:45:34,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 76 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 02:45:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-11-14 02:45:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 02:45:34,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:34,057 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2024-11-14 02:45:34,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 02:45:34,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 02:45:34,258 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:45:34,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 970538654, now seen corresponding path program 32 times [2024-11-14 02:45:34,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:34,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690351524] [2024-11-14 02:45:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:35,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690351524] [2024-11-14 02:45:35,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690351524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081109229] [2024-11-14 02:45:35,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:45:35,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:35,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:35,876 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:35,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 02:45:36,670 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-14 02:45:36,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:45:36,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-14 02:45:36,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:37,515 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 02:45:55,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:55,174 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 19 [2024-11-14 02:45:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:55,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:46:00,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 02:46:00,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 02:46:00,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 02:46:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:46:01,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081109229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:46:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523129441] [2024-11-14 02:46:01,638 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:46:01,638 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:46:01,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:46:01,639 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:46:01,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:46:01,813 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:46:04,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13105#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:46:04,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:46:04,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:46:04,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 98 [2024-11-14 02:46:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99713647] [2024-11-14 02:46:04,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:46:04,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-14 02:46:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:46:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-14 02:46:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=9726, Unknown=1, NotChecked=0, Total=10712 [2024-11-14 02:46:04,396 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 99 states, 99 states have (on average 1.878787878787879) internal successors, (186), 98 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:42,478 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2024-11-14 02:47:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-14 02:47:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.878787878787879) internal successors, (186), 98 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-14 02:47:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:42,479 INFO L225 Difference]: With dead ends: 118 [2024-11-14 02:47:42,479 INFO L226 Difference]: Without dead ends: 81 [2024-11-14 02:47:42,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 122 SyntacticMatches, 36 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6423 ImplicationChecksByTransitivity, 123.4s TimeCoverageRelationStatistics Valid=2306, Invalid=18571, Unknown=3, NotChecked=0, Total=20880 [2024-11-14 02:47:42,482 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:42,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 8 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2599 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 02:47:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-14 02:47:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-11-14 02:47:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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 02:47:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2024-11-14 02:47:42,486 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2024-11-14 02:47:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:42,486 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2024-11-14 02:47:42,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.878787878787879) internal successors, (186), 98 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2024-11-14 02:47:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 02:47:42,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:42,488 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2024-11-14 02:47:42,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 02:47:42,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 02:47:42,688 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:47:42,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash -561733774, now seen corresponding path program 33 times [2024-11-14 02:47:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:42,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752213665] [2024-11-14 02:47:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:42,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:44,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752213665] [2024-11-14 02:47:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752213665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438996623] [2024-11-14 02:47:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:47:44,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:44,765 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:44,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 02:47:45,695 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:47:45,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:47:45,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-14 02:47:45,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:46,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:47:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:47,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:47,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:47:47,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:47:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438996623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173598152] [2024-11-14 02:47:47,353 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:47:47,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:47,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:47,354 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:47,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:47:47,511 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:47:50,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13918#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:47:50,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:47:50,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:47:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 66 [2024-11-14 02:47:50,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923001096] [2024-11-14 02:47:50,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:47:50,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 02:47:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 02:47:50,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4931, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 02:47:50,158 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 67 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 66 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:53,613 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2024-11-14 02:47:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 02:47:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 66 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-14 02:47:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:53,615 INFO L225 Difference]: With dead ends: 121 [2024-11-14 02:47:53,615 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 02:47:53,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 185 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=280, Invalid=7910, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 02:47:53,616 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 3916 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:53,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 3934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3916 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 02:47:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 02:47:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2024-11-14 02:47:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-11-14 02:47:53,619 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2024-11-14 02:47:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:53,619 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-11-14 02:47:53,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 66 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-11-14 02:47:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 02:47:53,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:53,620 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1] [2024-11-14 02:47:53,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-14 02:47:53,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 02:47:53,821 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:47:53,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 380364685, now seen corresponding path program 34 times [2024-11-14 02:47:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:53,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150926446] [2024-11-14 02:47:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 289 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:55,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150926446] [2024-11-14 02:47:55,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150926446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939303019] [2024-11-14 02:47:55,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:47:55,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:55,534 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 02:47:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:55,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-14 02:47:55,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:57,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:59,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 02:48:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:48:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939303019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:48:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759066757] [2024-11-14 02:48:00,295 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:48:00,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:48:00,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:48:00,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:48:00,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:48:00,452 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:48:03,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14722#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:48:03,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:48:03,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:48:03,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 83 [2024-11-14 02:48:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859437760] [2024-11-14 02:48:03,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:48:03,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-14 02:48:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:48:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-14 02:48:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=7074, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 02:48:03,400 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:48:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:48:04,967 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-11-14 02:48:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 02:48:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-14 02:48:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:48:04,968 INFO L225 Difference]: With dead ends: 84 [2024-11-14 02:48:04,968 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 02:48:04,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 151 SyntacticMatches, 39 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5925 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=977, Invalid=7213, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 02:48:04,969 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:48:04,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 02:48:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 02:48:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-11-14 02:48:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:48:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2024-11-14 02:48:04,971 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2024-11-14 02:48:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:48:04,971 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2024-11-14 02:48:04,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:48:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2024-11-14 02:48:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 02:48:04,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:48:04,972 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2024-11-14 02:48:04,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-14 02:48:05,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 02:48:05,173 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:48:05,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:48:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 458241478, now seen corresponding path program 35 times [2024-11-14 02:48:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:48:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707598102] [2024-11-14 02:48:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:48:05,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:48:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:48:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:48:07,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:48:07,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707598102] [2024-11-14 02:48:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707598102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:48:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50832976] [2024-11-14 02:48:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:48:07,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:48:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:48:07,143 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:48:07,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 02:48:08,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 02:48:08,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:48:08,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-14 02:48:08,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:48:09,804 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 02:48:29,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:48:29,950 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 19 [2024-11-14 02:48:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:48:30,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:48:36,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 02:48:36,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 02:48:36,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:48:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:48:37,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50832976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:48:37,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042776124] [2024-11-14 02:48:37,875 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:48:37,875 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:48:37,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:48:37,876 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:48:37,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:48:37,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:48:41,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15491#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:48:41,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:48:41,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:48:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 108 [2024-11-14 02:48:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57380408] [2024-11-14 02:48:41,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:48:41,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-14 02:48:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:48:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-14 02:48:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=11691, Unknown=1, NotChecked=0, Total=12882 [2024-11-14 02:48:41,270 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 109 states, 109 states have (on average 1.889908256880734) internal successors, (206), 108 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:50:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:50:57,729 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2024-11-14 02:50:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-14 02:50:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.889908256880734) internal successors, (206), 108 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-11-14 02:50:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:50:57,730 INFO L225 Difference]: With dead ends: 130 [2024-11-14 02:50:57,730 INFO L226 Difference]: Without dead ends: 89 [2024-11-14 02:50:57,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 136 SyntacticMatches, 40 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7809 ImplicationChecksByTransitivity, 166.7s TimeCoverageRelationStatistics Valid=2775, Invalid=22344, Unknown=3, NotChecked=0, Total=25122 [2024-11-14 02:50:57,733 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3275 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:50:57,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 13 Invalid, 3313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3275 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 02:50:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-14 02:50:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-11-14 02:50:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:50:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2024-11-14 02:50:57,737 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2024-11-14 02:50:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:50:57,737 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2024-11-14 02:50:57,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.889908256880734) internal successors, (206), 108 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:50:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2024-11-14 02:50:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 02:50:57,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:50:57,738 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2024-11-14 02:50:57,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 02:50:57,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-14 02:50:57,939 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:50:57,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:50:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 468935066, now seen corresponding path program 36 times [2024-11-14 02:50:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:50:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427323472] [2024-11-14 02:50:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:50:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:50:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:00,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:51:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427323472] [2024-11-14 02:51:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427323472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:51:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567443885] [2024-11-14 02:51:00,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:51:00,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:51:00,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:51:00,786 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:51:00,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 02:51:02,423 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:51:02,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:51:02,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-14 02:51:02,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:51:04,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:51:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:04,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:51:04,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:51:04,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:51:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567443885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:51:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570768460] [2024-11-14 02:51:04,826 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:51:04,826 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:51:04,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:51:04,827 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:51:04,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:51:04,988 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:51:08,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16386#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:51:08,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:51:08,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:51:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 72 [2024-11-14 02:51:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470607762] [2024-11-14 02:51:08,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:51:08,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 02:51:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:51:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 02:51:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=5811, Unknown=0, NotChecked=0, Total=6006 [2024-11-14 02:51:08,048 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:51:12,231 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2024-11-14 02:51:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-14 02:51:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-14 02:51:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:51:12,232 INFO L225 Difference]: With dead ends: 133 [2024-11-14 02:51:12,232 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 02:51:12,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 205 SyntacticMatches, 21 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=304, Invalid=9398, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 02:51:12,233 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 4764 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:51:12,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4764 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-14 02:51:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 02:51:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-14 02:51:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 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 02:51:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2024-11-14 02:51:12,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2024-11-14 02:51:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:51:12,237 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2024-11-14 02:51:12,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2024-11-14 02:51:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 02:51:12,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:51:12,238 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1] [2024-11-14 02:51:12,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 02:51:12,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 02:51:12,438 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:51:12,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:51:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash 529161909, now seen corresponding path program 37 times [2024-11-14 02:51:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:51:12,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011108053] [2024-11-14 02:51:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:51:12,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:51:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 361 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:15,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:51:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011108053] [2024-11-14 02:51:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011108053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:51:15,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934851294] [2024-11-14 02:51:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:51:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:51:15,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:51:15,045 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:51:15,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 02:51:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:15,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-14 02:51:15,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:51:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:16,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:51:18,581 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 02:51:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934851294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:51:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065593358] [2024-11-14 02:51:19,821 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:51:19,821 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:51:19,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:51:19,821 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:51:19,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:51:19,948 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:51:22,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17270#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:51:22,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:51:22,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:51:22,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2024-11-14 02:51:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633192494] [2024-11-14 02:51:22,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:51:22,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-14 02:51:22,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:51:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-14 02:51:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=8392, Unknown=0, NotChecked=0, Total=9506 [2024-11-14 02:51:22,533 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 93 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 92 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:51:24,626 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2024-11-14 02:51:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 02:51:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 92 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-14 02:51:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:51:24,628 INFO L225 Difference]: With dead ends: 92 [2024-11-14 02:51:24,628 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 02:51:24,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 167 SyntacticMatches, 43 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7135 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1159, Invalid=8543, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 02:51:24,628 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:51:24,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 02:51:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 02:51:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-11-14 02:51:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2024-11-14 02:51:24,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2024-11-14 02:51:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:51:24,632 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2024-11-14 02:51:24,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 92 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2024-11-14 02:51:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 02:51:24,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:51:24,633 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2024-11-14 02:51:24,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 02:51:24,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 02:51:24,833 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:51:24,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:51:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1718452974, now seen corresponding path program 38 times [2024-11-14 02:51:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:51:24,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696030455] [2024-11-14 02:51:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:51:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:51:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:27,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:51:27,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696030455] [2024-11-14 02:51:27,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696030455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:51:27,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761360059] [2024-11-14 02:51:27,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:51:27,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:51:27,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:51:27,218 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:51:27,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 02:51:28,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 02:51:28,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:51:28,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-14 02:51:28,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:51:30,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:51:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:30,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:51:30,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:51:30,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:51:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761360059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:51:30,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928268408] [2024-11-14 02:51:30,587 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:51:30,587 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:51:30,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:51:30,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:51:30,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:51:30,739 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:51:33,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18070#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:51:33,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:51:33,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:51:33,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 75 [2024-11-14 02:51:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913797744] [2024-11-14 02:51:33,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:51:33,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 02:51:33,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:51:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 02:51:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6278, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 02:51:33,721 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 76 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 75 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 02:51:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:51:37,950 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2024-11-14 02:51:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 02:51:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 75 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 90 [2024-11-14 02:51:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:51:37,951 INFO L225 Difference]: With dead ends: 139 [2024-11-14 02:51:37,951 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 02:51:37,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 215 SyntacticMatches, 22 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=316, Invalid=10190, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 02:51:37,952 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5080 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 5080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:51:37,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 5101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 5080 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 02:51:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 02:51:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-11-14 02:51:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2024-11-14 02:51:37,955 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2024-11-14 02:51:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:51:37,955 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2024-11-14 02:51:37,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 75 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 02:51:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2024-11-14 02:51:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 02:51:37,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:51:37,956 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1] [2024-11-14 02:51:37,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 02:51:38,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 02:51:38,157 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:51:38,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:51:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1648723319, now seen corresponding path program 39 times [2024-11-14 02:51:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:51:38,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253186554] [2024-11-14 02:51:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:51:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:51:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 400 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:40,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:51:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253186554] [2024-11-14 02:51:40,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253186554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:51:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256128609] [2024-11-14 02:51:40,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:51:40,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:51:40,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:51:40,470 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:51:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 02:51:42,301 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:51:42,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:51:42,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-14 02:51:42,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:51:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:43,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:51:45,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:51:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:47,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256128609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:51:47,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219077855] [2024-11-14 02:51:47,700 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:51:47,700 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:51:47,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:51:47,701 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:51:47,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:51:47,869 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:51:51,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19015#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:51:51,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:51:51,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:51:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 116 [2024-11-14 02:51:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409243150] [2024-11-14 02:51:51,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:51:51,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-14 02:51:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:51:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-14 02:51:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=13021, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 02:51:51,182 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 118 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:51:53,599 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2024-11-14 02:51:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 02:51:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 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 92 [2024-11-14 02:51:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:51:53,601 INFO L225 Difference]: With dead ends: 96 [2024-11-14 02:51:53,601 INFO L226 Difference]: Without dead ends: 96 [2024-11-14 02:51:53,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 177 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8557 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2055, Invalid=13197, Unknown=0, NotChecked=0, Total=15252 [2024-11-14 02:51:53,602 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:51:53,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3344 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 02:51:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-14 02:51:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-11-14 02:51:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2024-11-14 02:51:53,605 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2024-11-14 02:51:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:51:53,605 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2024-11-14 02:51:53,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:51:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2024-11-14 02:51:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 02:51:53,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:51:53,606 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2024-11-14 02:51:53,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 02:51:53,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 02:51:53,807 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:51:53,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:51:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash 419822018, now seen corresponding path program 40 times [2024-11-14 02:51:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:51:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644632773] [2024-11-14 02:51:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:51:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:51:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:56,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:51:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644632773] [2024-11-14 02:51:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644632773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:51:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591720992] [2024-11-14 02:51:56,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:51:56,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:51:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:51:56,348 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:51:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 02:51:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:51:56,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-14 02:51:56,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:51:58,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:51:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:58,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:51:58,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:51:58,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:51:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:51:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591720992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:51:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447056586] [2024-11-14 02:51:59,034 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:51:59,034 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:51:59,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:51:59,035 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:51:59,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:51:59,181 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:02,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19850#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:52:02,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:02,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 78 [2024-11-14 02:52:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279353170] [2024-11-14 02:52:02,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:02,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-14 02:52:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-14 02:52:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=6763, Unknown=0, NotChecked=0, Total=6972 [2024-11-14 02:52:02,579 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 79 states, 79 states have (on average 1.8481012658227849) internal successors, (146), 78 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:07,233 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2024-11-14 02:52:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 02:52:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.8481012658227849) internal successors, (146), 78 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-14 02:52:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:07,234 INFO L225 Difference]: With dead ends: 145 [2024-11-14 02:52:07,234 INFO L226 Difference]: Without dead ends: 98 [2024-11-14 02:52:07,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 225 SyntacticMatches, 23 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=328, Invalid=11014, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 02:52:07,236 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 5722 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:07,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 5744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5722 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 02:52:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-14 02:52:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2024-11-14 02:52:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-11-14 02:52:07,239 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2024-11-14 02:52:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:07,240 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-11-14 02:52:07,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.8481012658227849) internal successors, (146), 78 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-11-14 02:52:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 02:52:07,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:07,241 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1] [2024-11-14 02:52:07,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 02:52:07,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 02:52:07,441 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:52:07,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1804053469, now seen corresponding path program 41 times [2024-11-14 02:52:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:07,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667502262] [2024-11-14 02:52:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 441 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:09,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667502262] [2024-11-14 02:52:09,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667502262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:09,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330724049] [2024-11-14 02:52:09,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:09,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:09,562 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:09,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 02:52:10,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 02:52:10,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:10,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-14 02:52:10,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:13,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:15,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:52:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330724049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753622077] [2024-11-14 02:52:16,944 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:52:16,944 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:16,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:16,944 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:16,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:17,074 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:19,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20837#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:52:19,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:19,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:19,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 122 [2024-11-14 02:52:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597667568] [2024-11-14 02:52:19,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:19,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-14 02:52:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-14 02:52:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2456, Invalid=14056, Unknown=0, NotChecked=0, Total=16512 [2024-11-14 02:52:19,987 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:21,496 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2024-11-14 02:52:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 02:52:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-14 02:52:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:21,498 INFO L225 Difference]: With dead ends: 100 [2024-11-14 02:52:21,498 INFO L226 Difference]: Without dead ends: 100 [2024-11-14 02:52:21,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 160 SyntacticMatches, 47 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12244 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2505, Invalid=14265, Unknown=0, NotChecked=0, Total=16770 [2024-11-14 02:52:21,499 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:21,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 02:52:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-14 02:52:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-11-14 02:52:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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 02:52:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2024-11-14 02:52:21,502 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2024-11-14 02:52:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:21,503 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2024-11-14 02:52:21,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2024-11-14 02:52:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 02:52:21,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:21,504 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2024-11-14 02:52:21,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-14 02:52:21,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 02:52:21,705 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:52:21,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1471404522, now seen corresponding path program 42 times [2024-11-14 02:52:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:21,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645695419] [2024-11-14 02:52:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:24,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:24,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645695419] [2024-11-14 02:52:24,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645695419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:24,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797905803] [2024-11-14 02:52:24,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:52:24,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:24,493 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:24,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 02:52:26,602 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:52:26,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:26,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-14 02:52:26,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:28,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:52:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:28,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:28,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:52:28,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:52:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797905803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343598741] [2024-11-14 02:52:29,185 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:52:29,185 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:29,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:29,186 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:29,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:29,348 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:32,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21707#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:52:32,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:32,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:32,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 81 [2024-11-14 02:52:32,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992953974] [2024-11-14 02:52:32,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:32,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 02:52:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 02:52:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7266, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 02:52:32,857 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 82 states, 82 states have (on average 1.853658536585366) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:37,662 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2024-11-14 02:52:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-14 02:52:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.853658536585366) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-14 02:52:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:37,664 INFO L225 Difference]: With dead ends: 151 [2024-11-14 02:52:37,664 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 02:52:37,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 235 SyntacticMatches, 24 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=340, Invalid=11870, Unknown=0, NotChecked=0, Total=12210 [2024-11-14 02:52:37,665 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5977 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:37,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 6000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5977 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 02:52:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 02:52:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-11-14 02:52:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-14 02:52:37,669 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2024-11-14 02:52:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:37,669 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-14 02:52:37,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.853658536585366) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-14 02:52:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 02:52:37,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:37,670 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1] [2024-11-14 02:52:37,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-14 02:52:37,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 02:52:37,871 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:52:37,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1608428879, now seen corresponding path program 43 times [2024-11-14 02:52:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461225506] [2024-11-14 02:52:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 484 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:41,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461225506] [2024-11-14 02:52:41,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461225506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103212987] [2024-11-14 02:52:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:52:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:41,194 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:41,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 02:52:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:41,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-14 02:52:41,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:43,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:45,651 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 02:52:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103212987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733945882] [2024-11-14 02:52:47,099 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:52:47,099 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:47,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:47,099 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:47,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:47,217 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:49,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22711#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:52:49,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:49,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 103 [2024-11-14 02:52:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345654288] [2024-11-14 02:52:49,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:49,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-14 02:52:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-14 02:52:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=10579, Unknown=0, NotChecked=0, Total=11990 [2024-11-14 02:52:49,992 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 105 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 104 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:52,175 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2024-11-14 02:52:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 02:52:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 104 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-14 02:52:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:52,176 INFO L225 Difference]: With dead ends: 104 [2024-11-14 02:52:52,176 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 02:52:52,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 191 SyntacticMatches, 49 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9160 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1462, Invalid=10748, Unknown=0, NotChecked=0, Total=12210 [2024-11-14 02:52:52,177 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:52,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 02:52:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 02:52:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-11-14 02:52:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2024-11-14 02:52:52,181 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2024-11-14 02:52:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:52,181 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2024-11-14 02:52:52,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 104 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2024-11-14 02:52:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 02:52:52,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:52,182 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2024-11-14 02:52:52,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 02:52:52,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:52,383 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:52:52,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:52,383 INFO L85 PathProgramCache]: Analyzing trace with hash 488073194, now seen corresponding path program 44 times [2024-11-14 02:52:52,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515500642] [2024-11-14 02:52:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:55,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515500642] [2024-11-14 02:52:55,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515500642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:55,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612246839] [2024-11-14 02:52:55,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:52:55,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:55,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:55,463 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:55,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 02:52:57,438 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 02:52:57,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:57,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-14 02:52:57,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:59,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:52:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:52:59,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:59,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:52:59,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:53:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:00,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612246839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:00,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275976502] [2024-11-14 02:53:00,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:53:00,108 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:00,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:00,108 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:00,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:00,268 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:53:03,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23616#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:53:03,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:53:03,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:03,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 84 [2024-11-14 02:53:03,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855460152] [2024-11-14 02:53:03,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:03,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-14 02:53:03,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-14 02:53:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=7787, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 02:53:03,756 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 85 states, 85 states have (on average 1.8588235294117648) internal successors, (158), 84 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:08,829 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2024-11-14 02:53:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-14 02:53:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8588235294117648) internal successors, (158), 84 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-14 02:53:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:08,830 INFO L225 Difference]: With dead ends: 157 [2024-11-14 02:53:08,830 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 02:53:08,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 245 SyntacticMatches, 25 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=352, Invalid=12758, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 02:53:08,831 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6276 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 6276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:08,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 6300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 6276 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 02:53:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 02:53:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2024-11-14 02:53:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-11-14 02:53:08,835 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2024-11-14 02:53:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:08,835 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-11-14 02:53:08,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8588235294117648) internal successors, (158), 84 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-11-14 02:53:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 02:53:08,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:08,836 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1] [2024-11-14 02:53:08,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-14 02:53:09,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:09,037 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:53:09,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1761685755, now seen corresponding path program 45 times [2024-11-14 02:53:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829548558] [2024-11-14 02:53:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:09,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 529 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:11,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829548558] [2024-11-14 02:53:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829548558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182158547] [2024-11-14 02:53:11,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:53:11,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:11,947 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:11,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 02:53:13,417 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:53:13,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:53:13,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-14 02:53:13,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:15,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:17,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:53:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182158547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579862664] [2024-11-14 02:53:20,631 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:53:20,631 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:20,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:20,770 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:53:24,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24684#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:53:24,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:53:24,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:24,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 131 [2024-11-14 02:53:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334655872] [2024-11-14 02:53:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:24,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-14 02:53:24,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-14 02:53:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2513, Invalid=16393, Unknown=0, NotChecked=0, Total=18906 [2024-11-14 02:53:24,746 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 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 02:53:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:27,089 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2024-11-14 02:53:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 02:53:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 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) Word has length 104 [2024-11-14 02:53:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:27,090 INFO L225 Difference]: With dead ends: 108 [2024-11-14 02:53:27,090 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 02:53:27,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 201 SyntacticMatches, 25 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10924 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2592, Invalid=16590, Unknown=0, NotChecked=0, Total=19182 [2024-11-14 02:53:27,091 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3450 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:27,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3450 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 02:53:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 02:53:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2024-11-14 02:53:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 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 02:53:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2024-11-14 02:53:27,094 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2024-11-14 02:53:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:27,095 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2024-11-14 02:53:27,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 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 02:53:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2024-11-14 02:53:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 02:53:27,096 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:27,096 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2024-11-14 02:53:27,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-14 02:53:27,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:27,296 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:53:27,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash -762896578, now seen corresponding path program 46 times [2024-11-14 02:53:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:27,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679275692] [2024-11-14 02:53:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:27,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:30,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679275692] [2024-11-14 02:53:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679275692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48228308] [2024-11-14 02:53:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:53:30,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:30,605 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:30,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 02:53:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:30,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-14 02:53:30,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:33,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:53:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:33,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:33,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:53:33,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:53:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48228308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350153370] [2024-11-14 02:53:33,796 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:53:33,797 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:33,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:33,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:33,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:33,955 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:53:38,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25624#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:53:38,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:53:38,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:53:38,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 87 [2024-11-14 02:53:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664621025] [2024-11-14 02:53:38,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:53:38,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 02:53:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 02:53:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8326, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 02:53:38,098 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 88 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 87 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:44,222 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2024-11-14 02:53:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-14 02:53:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 87 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-11-14 02:53:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:44,223 INFO L225 Difference]: With dead ends: 163 [2024-11-14 02:53:44,223 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 02:53:44,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 255 SyntacticMatches, 26 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=364, Invalid=13678, Unknown=0, NotChecked=0, Total=14042 [2024-11-14 02:53:44,224 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 7403 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 7403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:44,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 7428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 7403 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 02:53:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 02:53:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2024-11-14 02:53:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2024-11-14 02:53:44,228 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2024-11-14 02:53:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:44,228 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2024-11-14 02:53:44,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 87 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:53:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2024-11-14 02:53:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 02:53:44,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:44,229 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1] [2024-11-14 02:53:44,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 02:53:44,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-14 02:53:44,430 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:53:44,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1377861415, now seen corresponding path program 47 times [2024-11-14 02:53:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86922157] [2024-11-14 02:53:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 576 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:47,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86922157] [2024-11-14 02:53:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86922157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158491494] [2024-11-14 02:53:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:53:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:47,414 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:47,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 02:53:49,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-14 02:53:49,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:53:49,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-14 02:53:49,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:53,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:56,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 02:53:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:57,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158491494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:53:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833017357] [2024-11-14 02:53:57,811 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:53:57,811 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:53:57,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:53:57,812 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:53:57,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:53:57,947 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:54:01,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26734#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:54:01,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:54:01,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:01,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 137 [2024-11-14 02:54:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247225892] [2024-11-14 02:54:01,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:01,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-14 02:54:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-14 02:54:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=17509, Unknown=0, NotChecked=0, Total=20592 [2024-11-14 02:54:01,211 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 139 states, 138 states have (on average 1.9565217391304348) internal successors, (270), 138 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:03,053 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2024-11-14 02:54:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 02:54:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 138 states have (on average 1.9565217391304348) internal successors, (270), 138 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-11-14 02:54:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:03,054 INFO L225 Difference]: With dead ends: 112 [2024-11-14 02:54:03,054 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 02:54:03,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 181 SyntacticMatches, 53 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15439 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=3138, Invalid=17742, Unknown=0, NotChecked=0, Total=20880 [2024-11-14 02:54:03,055 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:03,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 02:54:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 02:54:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2024-11-14 02:54:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 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 02:54:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2024-11-14 02:54:03,059 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2024-11-14 02:54:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:03,059 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2024-11-14 02:54:03,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 138 states have (on average 1.9565217391304348) internal successors, (270), 138 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2024-11-14 02:54:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 02:54:03,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:03,060 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2024-11-14 02:54:03,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 02:54:03,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-14 02:54:03,261 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:54:03,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1274893294, now seen corresponding path program 48 times [2024-11-14 02:54:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429077742] [2024-11-14 02:54:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:03,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:07,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429077742] [2024-11-14 02:54:07,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429077742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804134962] [2024-11-14 02:54:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:54:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:07,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:07,173 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:07,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 02:54:09,812 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:54:09,812 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:54:09,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-11-14 02:54:09,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:12,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:54:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:12,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:12,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:54:12,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:54:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804134962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471402443] [2024-11-14 02:54:12,839 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:54:12,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:54:12,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:54:12,839 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:54:12,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:54:13,076 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:54:17,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27709#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:54:17,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:54:17,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:17,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 90 [2024-11-14 02:54:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616549160] [2024-11-14 02:54:17,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:17,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-14 02:54:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-14 02:54:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=8883, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 02:54:17,023 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 91 states, 91 states have (on average 1.8681318681318682) internal successors, (170), 90 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:23,359 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2024-11-14 02:54:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-14 02:54:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.8681318681318682) internal successors, (170), 90 states have internal predecessors, (170), 0 states have call successors, (0), 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 110 [2024-11-14 02:54:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:23,361 INFO L225 Difference]: With dead ends: 169 [2024-11-14 02:54:23,361 INFO L226 Difference]: Without dead ends: 114 [2024-11-14 02:54:23,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 265 SyntacticMatches, 27 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=376, Invalid=14630, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 02:54:23,362 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 7848 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 7848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:23,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 7874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 7848 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-14 02:54:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-14 02:54:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2024-11-14 02:54:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2024-11-14 02:54:23,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2024-11-14 02:54:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:23,364 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2024-11-14 02:54:23,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.8681318681318682) internal successors, (170), 90 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2024-11-14 02:54:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 02:54:23,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:23,365 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1] [2024-11-14 02:54:23,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-14 02:54:23,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-14 02:54:23,566 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:54:23,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2100639699, now seen corresponding path program 49 times [2024-11-14 02:54:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:23,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746185352] [2024-11-14 02:54:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 625 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:26,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:26,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746185352] [2024-11-14 02:54:26,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746185352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:26,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462721592] [2024-11-14 02:54:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:54:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:26,342 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:26,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 02:54:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:26,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-14 02:54:26,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:28,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:30,784 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 02:54:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:32,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462721592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660751781] [2024-11-14 02:54:32,251 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:54:32,251 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:54:32,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:54:32,251 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:54:32,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:54:32,369 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:54:35,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28833#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:54:35,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:54:35,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 115 [2024-11-14 02:54:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264961821] [2024-11-14 02:54:35,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:35,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-14 02:54:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-14 02:54:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1744, Invalid=13018, Unknown=0, NotChecked=0, Total=14762 [2024-11-14 02:54:35,496 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 117 states, 116 states have (on average 1.956896551724138) internal successors, (227), 116 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:38,226 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2024-11-14 02:54:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 02:54:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 116 states have (on average 1.956896551724138) internal successors, (227), 116 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-11-14 02:54:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:38,228 INFO L225 Difference]: With dead ends: 116 [2024-11-14 02:54:38,228 INFO L226 Difference]: Without dead ends: 116 [2024-11-14 02:54:38,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 215 SyntacticMatches, 55 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11437 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1801, Invalid=13205, Unknown=0, NotChecked=0, Total=15006 [2024-11-14 02:54:38,229 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 4679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:38,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 4679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 02:54:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-14 02:54:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2024-11-14 02:54:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2024-11-14 02:54:38,231 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2024-11-14 02:54:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:38,231 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2024-11-14 02:54:38,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 116 states have (on average 1.956896551724138) internal successors, (227), 116 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2024-11-14 02:54:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 02:54:38,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:38,232 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2024-11-14 02:54:38,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 02:54:38,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:38,433 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:54:38,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash -80122266, now seen corresponding path program 50 times [2024-11-14 02:54:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:38,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642460412] [2024-11-14 02:54:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 28 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:42,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:42,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642460412] [2024-11-14 02:54:42,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642460412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:42,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068950436] [2024-11-14 02:54:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:54:42,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:42,266 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:42,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 02:54:44,993 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-14 02:54:44,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:54:45,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-14 02:54:45,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:47,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:54:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 28 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:47,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:54:47,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:54:47,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:54:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 28 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:54:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068950436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:54:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782136222] [2024-11-14 02:54:48,029 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:54:48,029 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:54:48,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:54:48,029 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:54:48,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:54:48,199 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:54:52,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29843#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:54:52,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:54:52,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:54:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 93 [2024-11-14 02:54:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788255133] [2024-11-14 02:54:52,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:54:52,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 02:54:52,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 02:54:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=9458, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 02:54:52,528 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 94 states, 94 states have (on average 1.872340425531915) internal successors, (176), 93 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 02:54:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:58,758 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2024-11-14 02:54:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-14 02:54:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.872340425531915) internal successors, (176), 93 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-14 02:54:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:58,759 INFO L225 Difference]: With dead ends: 175 [2024-11-14 02:54:58,759 INFO L226 Difference]: Without dead ends: 118 [2024-11-14 02:54:58,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 275 SyntacticMatches, 28 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=388, Invalid=15614, Unknown=0, NotChecked=0, Total=16002 [2024-11-14 02:54:58,760 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8061 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 8088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 8061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:58,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 8088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 8061 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 02:54:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-14 02:54:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-11-14 02:54:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:54:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2024-11-14 02:54:58,762 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2024-11-14 02:54:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:58,762 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2024-11-14 02:54:58,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.872340425531915) internal successors, (176), 93 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 02:54:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2024-11-14 02:54:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-14 02:54:58,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:58,763 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1] [2024-11-14 02:54:58,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 02:54:58,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-14 02:54:58,963 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:54:58,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1307572991, now seen corresponding path program 51 times [2024-11-14 02:54:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442009510] [2024-11-14 02:54:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 676 proven. 892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:02,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442009510] [2024-11-14 02:55:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442009510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473372122] [2024-11-14 02:55:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:55:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:02,679 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:02,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 02:55:06,038 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:55:06,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:55:06,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-14 02:55:06,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:08,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:11,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-14 02:55:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:14,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473372122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:14,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100158357] [2024-11-14 02:55:14,356 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:55:14,356 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:55:14,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:55:14,356 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:55:14,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:55:14,491 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:55:18,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31034#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:55:18,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:55:18,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:55:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 146 [2024-11-14 02:55:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944559487] [2024-11-14 02:55:18,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:18,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-14 02:55:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:55:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-14 02:55:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3104, Invalid=20152, Unknown=0, NotChecked=0, Total=23256 [2024-11-14 02:55:18,980 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 148 states, 147 states have (on average 1.9931972789115646) internal successors, (293), 147 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:22,182 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2024-11-14 02:55:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 02:55:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 1.9931972789115646) internal successors, (293), 147 states have internal predecessors, (293), 0 states have call successors, (0), 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 116 [2024-11-14 02:55:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:22,184 INFO L225 Difference]: With dead ends: 120 [2024-11-14 02:55:22,184 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 02:55:22,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 225 SyntacticMatches, 28 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13579 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=3192, Invalid=20370, Unknown=0, NotChecked=0, Total=23562 [2024-11-14 02:55:22,185 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 4762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:22,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 4762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 02:55:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 02:55:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2024-11-14 02:55:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2024-11-14 02:55:22,188 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2024-11-14 02:55:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:22,188 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2024-11-14 02:55:22,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 1.9931972789115646) internal successors, (293), 147 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2024-11-14 02:55:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-14 02:55:22,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:22,189 INFO L215 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2024-11-14 02:55:22,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-14 02:55:22,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:22,390 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:55:22,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1847772730, now seen corresponding path program 52 times [2024-11-14 02:55:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844684938] [2024-11-14 02:55:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 29 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:25,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844684938] [2024-11-14 02:55:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844684938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068481881] [2024-11-14 02:55:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:55:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:25,800 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:25,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 02:55:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:26,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-14 02:55:26,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:28,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 02:55:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 29 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:28,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:28,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 02:55:28,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 02:55:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 29 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068481881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370533700] [2024-11-14 02:55:29,280 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:55:29,280 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:55:29,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:55:29,281 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:55:29,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:55:29,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:55:33,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32079#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:55:33,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:55:33,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:55:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 96 [2024-11-14 02:55:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176159064] [2024-11-14 02:55:33,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:55:33,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 02:55:33,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:55:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 02:55:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 02:55:33,756 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 97 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 96 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:40,166 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2024-11-14 02:55:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-14 02:55:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 96 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2024-11-14 02:55:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:40,167 INFO L225 Difference]: With dead ends: 181 [2024-11-14 02:55:40,167 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 02:55:40,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 285 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=400, Invalid=16630, Unknown=0, NotChecked=0, Total=17030 [2024-11-14 02:55:40,168 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8984 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 8984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:40,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 9012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 8984 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 02:55:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 02:55:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-11-14 02:55:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2024-11-14 02:55:40,171 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2024-11-14 02:55:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:40,171 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2024-11-14 02:55:40,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 96 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2024-11-14 02:55:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 02:55:40,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:40,172 INFO L215 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1] [2024-11-14 02:55:40,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 02:55:40,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:40,373 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:55:40,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 340170581, now seen corresponding path program 53 times [2024-11-14 02:55:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536619533] [2024-11-14 02:55:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 729 proven. 953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:44,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536619533] [2024-11-14 02:55:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536619533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124482947] [2024-11-14 02:55:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:55:44,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:44,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:44,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 02:55:46,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-14 02:55:46,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:55:46,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-14 02:55:46,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:46,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 02:55:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:51,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 784 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124482947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523336573] [2024-11-14 02:55:58,544 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:55:58,544 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:55:58,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:55:58,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:55:58,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:55:58,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:04,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33342#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_cstrlen_~str#1.offset| 0) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 02:56:04,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:04,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:04,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 182 [2024-11-14 02:56:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706700019] [2024-11-14 02:56:04,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:04,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2024-11-14 02:56:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2024-11-14 02:56:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5122, Invalid=30410, Unknown=0, NotChecked=0, Total=35532 [2024-11-14 02:56:04,303 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 184 states, 183 states have (on average 1.9672131147540983) internal successors, (360), 183 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:06,598 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2024-11-14 02:56:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 02:56:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 183 states have (on average 1.9672131147540983) internal successors, (360), 183 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2024-11-14 02:56:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:06,600 INFO L225 Difference]: With dead ends: 124 [2024-11-14 02:56:06,600 INFO L226 Difference]: Without dead ends: 124 [2024-11-14 02:56:06,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 202 SyntacticMatches, 29 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21766 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=5213, Invalid=30697, Unknown=0, NotChecked=0, Total=35910 [2024-11-14 02:56:06,601 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:06,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3296 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 02:56:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-14 02:56:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2024-11-14 02:56:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 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 02:56:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2024-11-14 02:56:06,604 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2024-11-14 02:56:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:06,605 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2024-11-14 02:56:06,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 183 states have (on average 1.9672131147540983) internal successors, (360), 183 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2024-11-14 02:56:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 02:56:06,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:06,606 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2024-11-14 02:56:06,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-14 02:56:06,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:06,807 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-14 02:56:06,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash 486413198, now seen corresponding path program 54 times [2024-11-14 02:56:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:06,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668881519] [2024-11-14 02:56:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:06,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 30 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:10,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668881519] [2024-11-14 02:56:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668881519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766628601] [2024-11-14 02:56:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:56:10,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:10,667 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:10,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c2674-1f86-4fd8-b140-2796f8effdd1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 02:56:14,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:56:14,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:56:14,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-14 02:56:14,166 INFO L278 TraceCheckSpWp]: Computing forward predicates...