./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/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_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/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_3a7227f3-0599-4309-8e41-b2d82334075c/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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:12:12,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:12:13,096 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:12:13,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:12:13,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:12:13,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:12:13,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:12:13,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:12:13,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:12:13,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:12:13,156 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:12:13,156 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:12:13,156 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:12:13,157 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:12:13,157 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:12:13,157 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:12:13,158 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:12:13,158 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:12:13,158 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:12:13,159 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:12:13,159 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:12:13,159 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:12:13,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:12:13,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:12:13,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:12:13,161 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:12:13,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:12:13,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:12:13,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:13,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:12:13,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:12:13,165 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:12:13,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:12:13,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:12:13,165 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:12:13,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:12:13,166 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_3a7227f3-0599-4309-8e41-b2d82334075c/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 -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2024-11-14 03:12:13,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:12:13,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:12:13,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:12:13,580 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:12:13,581 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:12:13,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i Unable to find full path for "g++" [2024-11-14 03:12:15,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:12:16,234 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:12:16,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2024-11-14 03:12:16,250 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/data/e72968f08/ce2b0992616d4863990035e855fc3bf0/FLAGabdff1b38 [2024-11-14 03:12:16,266 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/data/e72968f08/ce2b0992616d4863990035e855fc3bf0 [2024-11-14 03:12:16,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:12:16,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:12:16,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:16,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:12:16,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:12:16,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7283a581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16, skipping insertion in model container [2024-11-14 03:12:16,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:12:16,688 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 03:12:16,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:16,706 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:12:16,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:16,801 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:12:16,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16 WrapperNode [2024-11-14 03:12:16,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:16,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:16,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:12:16,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:12:16,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,839 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-11-14 03:12:16,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:16,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:12:16,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:12:16,840 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:12:16,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,849 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,856 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,860 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:12:16,865 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:12:16,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:12:16,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:12:16,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (1/1) ... [2024-11-14 03:12:16,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:16,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:12:16,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:12:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:12:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:12:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:12:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:12:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:12:16,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:12:17,076 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:12:17,078 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:12:17,380 INFO L? ?]: Removed 37 outVars from TransFormulas that were not future-live. [2024-11-14 03:12:17,380 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:12:17,478 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:12:17,481 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 03:12:17,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:17 BoogieIcfgContainer [2024-11-14 03:12:17,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:12:17,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:12:17,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:12:17,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:12:17,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:12:16" (1/3) ... [2024-11-14 03:12:17,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722b8bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:17, skipping insertion in model container [2024-11-14 03:12:17,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:16" (2/3) ... [2024-11-14 03:12:17,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722b8bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:17, skipping insertion in model container [2024-11-14 03:12:17,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:17" (3/3) ... [2024-11-14 03:12:17,501 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2024-11-14 03:12:17,521 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:12:17,522 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG strreplace-alloca-2.i that has 1 procedures, 24 locations, 1 initial locations, 2 loop locations, and 11 error locations. [2024-11-14 03:12:17,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:12:17,591 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;@7a3a37d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:12:17,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-14 03:12:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.25) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:12:17,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:17,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:12:17,605 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:17,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 102412, now seen corresponding path program 1 times [2024-11-14 03:12:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:17,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080741554] [2024-11-14 03:12:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:17,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:17,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080741554] [2024-11-14 03:12:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080741554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:17,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:17,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:12:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86935595] [2024-11-14 03:12:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:17,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:18,002 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.25) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:18,096 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-11-14 03:12:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:18,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:12:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:18,107 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:12:18,107 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 03:12:18,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:18,113 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:18,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 03:12:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 03:12:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-14 03:12:18,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2024-11-14 03:12:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:18,153 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-14 03:12:18,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-14 03:12:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:12:18,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:18,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:12:18,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:12:18,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:18,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 102413, now seen corresponding path program 1 times [2024-11-14 03:12:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271096437] [2024-11-14 03:12:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:18,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271096437] [2024-11-14 03:12:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271096437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:18,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:18,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858433354] [2024-11-14 03:12:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:18,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:12:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:12:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:18,599 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:18,700 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-14 03:12:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:12:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:12:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:18,701 INFO L225 Difference]: With dead ends: 23 [2024-11-14 03:12:18,702 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 03:12:18,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:18,703 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:18,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 03:12:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 03:12:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 22 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 03:12:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-14 03:12:18,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2024-11-14 03:12:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:18,709 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-14 03:12:18,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-14 03:12:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:12:18,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:18,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:12:18,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:12:18,710 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:18,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash 104126, now seen corresponding path program 1 times [2024-11-14 03:12:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:18,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373819258] [2024-11-14 03:12:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:18,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373819258] [2024-11-14 03:12:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373819258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:18,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765581488] [2024-11-14 03:12:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:18,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:12:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:12:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:18,986 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:19,052 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 03:12:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 03:12:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:19,056 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:12:19,056 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:12:19,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:19,057 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:19,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:12:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 03:12:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 03:12:19,068 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2024-11-14 03:12:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:19,068 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 03:12:19,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 03:12:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:12:19,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:19,069 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:12:19,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:12:19,069 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:19,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 3229242, now seen corresponding path program 1 times [2024-11-14 03:12:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544495390] [2024-11-14 03:12:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:19,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544495390] [2024-11-14 03:12:19,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544495390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:19,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:19,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424056103] [2024-11-14 03:12:19,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:19,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:19,137 INFO L87 Difference]: Start difference. First operand 22 states and 25 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 03:12:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:19,185 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2024-11-14 03:12:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:19,186 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 03:12:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:19,187 INFO L225 Difference]: With dead ends: 19 [2024-11-14 03:12:19,187 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 03:12:19,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:19,190 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:19,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 03:12:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 03:12:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-14 03:12:19,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2024-11-14 03:12:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:19,200 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-14 03:12:19,200 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 03:12:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-14 03:12:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:12:19,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:19,201 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:12:19,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:12:19,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:19,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash 3229243, now seen corresponding path program 1 times [2024-11-14 03:12:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:19,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949726999] [2024-11-14 03:12:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:19,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949726999] [2024-11-14 03:12:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949726999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:19,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340264536] [2024-11-14 03:12:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:19,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:12:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:12:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:19,366 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:19,428 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2024-11-14 03:12:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:12:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:12:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:19,429 INFO L225 Difference]: With dead ends: 18 [2024-11-14 03:12:19,429 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:12:19,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:19,431 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:19,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:12:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 03:12:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-14 03:12:19,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2024-11-14 03:12:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:19,435 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-14 03:12:19,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-14 03:12:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:12:19,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:19,436 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 03:12:19,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:12:19,436 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:19,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 98462685, now seen corresponding path program 1 times [2024-11-14 03:12:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058545103] [2024-11-14 03:12:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:19,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:19,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058545103] [2024-11-14 03:12:19,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058545103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:19,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935280691] [2024-11-14 03:12:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:19,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:19,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:12:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:12:19,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:20,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-14 03:12:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:20,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935280691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507784643] [2024-11-14 03:12:20,563 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 03:12:20,563 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:20,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:20,579 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:20,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:21,207 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:21,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(exists ((|v_ULTIMATE.start_main_~nondetString1~0#1.base_27| Int) (|v_ULTIMATE.start_main_~i~0#1_34| Int)) (and (<= |ULTIMATE.start_main_#t~nondet8#1| 127) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_34|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_27|) (<= |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_34|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet8#1|))))' at error location [2024-11-14 03:12:21,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:21,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:21,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 03:12:21,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108284210] [2024-11-14 03:12:21,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:21,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:12:21,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:21,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:12:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:12:21,460 INFO L87 Difference]: Start difference. First operand 18 states and 21 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 03:12:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:21,669 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2024-11-14 03:12:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:12:21,670 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 03:12:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:21,671 INFO L225 Difference]: With dead ends: 18 [2024-11-14 03:12:21,671 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:12:21,671 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 03:12:21,672 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:21,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:12:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2024-11-14 03:12:21,675 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 03:12:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-14 03:12:21,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2024-11-14 03:12:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:21,676 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-14 03:12:21,676 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 03:12:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-14 03:12:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:12:21,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:21,677 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:21,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:12:21,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:12:21,882 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:21,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076838, now seen corresponding path program 1 times [2024-11-14 03:12:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:21,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423458216] [2024-11-14 03:12:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:21,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:22,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:22,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423458216] [2024-11-14 03:12:22,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423458216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947378229] [2024-11-14 03:12:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:22,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:12:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:12:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:22,053 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 03:12:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:22,086 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2024-11-14 03:12:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:12:22,087 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 03:12:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:22,088 INFO L225 Difference]: With dead ends: 14 [2024-11-14 03:12:22,088 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 03:12:22,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:12:22,089 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:22,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 03:12:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-14 03:12:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-14 03:12:22,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-14 03:12:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:22,095 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-14 03:12:22,096 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 03:12:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-14 03:12:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:12:22,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:22,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:22,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:12:22,097 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:22,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1295371943, now seen corresponding path program 1 times [2024-11-14 03:12:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469116451] [2024-11-14 03:12:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:22,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469116451] [2024-11-14 03:12:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469116451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:12:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067253084] [2024-11-14 03:12:22,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:22,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:12:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:12:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:12:22,468 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:22,557 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-14 03:12:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:12:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 03:12:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:22,558 INFO L225 Difference]: With dead ends: 17 [2024-11-14 03:12:22,558 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 03:12:22,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 03:12:22,559 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 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 03:12:22,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 03:12:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-11-14 03:12:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) 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 03:12:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-14 03:12:22,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2024-11-14 03:12:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:22,563 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-14 03:12:22,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-14 03:12:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:12:22,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:22,563 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:22,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:12:22,564 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:22,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1842515575, now seen corresponding path program 1 times [2024-11-14 03:12:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:22,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100421060] [2024-11-14 03:12:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:23,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:23,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100421060] [2024-11-14 03:12:23,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100421060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:23,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198627517] [2024-11-14 03:12:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:23,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:23,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:23,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:12:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:23,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:12:23,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:23,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:23,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:12:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198627517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214198370] [2024-11-14 03:12:23,423 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:23,423 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:23,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:23,424 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:23,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:24,901 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:25,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:25,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:25,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:25,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-14 03:12:25,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455722929] [2024-11-14 03:12:25,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:25,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:12:25,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:25,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:12:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:12:25,143 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 03:12:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:25,281 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-14 03:12:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:12:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) Word has length 11 [2024-11-14 03:12:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:25,282 INFO L225 Difference]: With dead ends: 25 [2024-11-14 03:12:25,282 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:12:25,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:12:25,284 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:25,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:12:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2024-11-14 03:12:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-14 03:12:25,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2024-11-14 03:12:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:25,288 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-14 03:12:25,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 03:12:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-14 03:12:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:12:25,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:25,289 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:25,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:12:25,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:12:25,493 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:25,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2139376619, now seen corresponding path program 2 times [2024-11-14 03:12:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:25,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330667910] [2024-11-14 03:12:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:25,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330667910] [2024-11-14 03:12:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330667910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333116395] [2024-11-14 03:12:25,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:25,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:25,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:12:26,071 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:12:26,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:26,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:12:26,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:26,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:26,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:26,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:26,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:12:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333116395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:26,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597628765] [2024-11-14 03:12:26,416 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:26,416 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:26,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:26,417 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:26,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:27,491 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:28,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '634#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:28,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:28,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-14 03:12:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696383800] [2024-11-14 03:12:28,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:28,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:12:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:12:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:12:28,141 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:28,372 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-14 03:12:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:12:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:12:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:28,373 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:12:28,373 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:12:28,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:12:28,375 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:28,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:12:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-14 03:12:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 03:12:28,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2024-11-14 03:12:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:28,379 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 03:12:28,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 03:12:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:12:28,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:28,380 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 03:12:28,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:12:28,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:12:28,581 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:28,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash 517415451, now seen corresponding path program 3 times [2024-11-14 03:12:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119949053] [2024-11-14 03:12:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:28,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119949053] [2024-11-14 03:12:28,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119949053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590076573] [2024-11-14 03:12:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:28,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:28,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:28,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:12:29,031 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:29,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:29,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:12:29,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:29,045 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 03:12:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:29,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590076573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868770181] [2024-11-14 03:12:29,467 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:29,468 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:29,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:29,468 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:29,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:30,397 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:30,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '818#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:30,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:30,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-14 03:12:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483686277] [2024-11-14 03:12:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:30,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:12:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:12:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:12:30,982 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:31,186 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-14 03:12:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:12:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 03:12:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:31,189 INFO L225 Difference]: With dead ends: 32 [2024-11-14 03:12:31,189 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 03:12:31,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:12:31,190 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:31,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 84 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 03:12:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-14 03:12:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 03:12:31,199 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2024-11-14 03:12:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:31,200 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 03:12:31,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 03:12:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:12:31,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:31,202 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-14 03:12:31,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:12:31,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:12:31,403 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:31,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1052877113, now seen corresponding path program 4 times [2024-11-14 03:12:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289539956] [2024-11-14 03:12:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:31,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289539956] [2024-11-14 03:12:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289539956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781678385] [2024-11-14 03:12:31,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:12:31,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:31,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:31,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:12:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:32,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:12:32,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:32,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:32,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:32,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:32,208 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 16 treesize of output 12 [2024-11-14 03:12:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:32,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781678385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865537934] [2024-11-14 03:12:32,282 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:32,282 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:32,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:32,283 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:32,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:33,133 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:33,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1038#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:33,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:33,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:33,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-11-14 03:12:33,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077463601] [2024-11-14 03:12:33,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:33,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:12:33,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:12:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:12:33,841 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:34,196 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-11-14 03:12:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:12:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-14 03:12:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:34,198 INFO L225 Difference]: With dead ends: 45 [2024-11-14 03:12:34,199 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 03:12:34,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:12:34,201 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:34,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 75 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 03:12:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-14 03:12:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-14 03:12:34,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2024-11-14 03:12:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:34,210 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-14 03:12:34,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-14 03:12:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:12:34,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:34,211 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-14 03:12:34,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:12:34,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:12:34,413 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:34,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1466380951, now seen corresponding path program 5 times [2024-11-14 03:12:34,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:34,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448950471] [2024-11-14 03:12:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:34,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:34,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448950471] [2024-11-14 03:12:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448950471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120064897] [2024-11-14 03:12:34,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:34,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:34,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:34,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:34,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:12:34,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:12:34,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:34,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 03:12:34,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:35,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:35,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:12:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120064897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591338351] [2024-11-14 03:12:35,353 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:35,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:35,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:35,354 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:35,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:36,166 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:36,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1296#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:36,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:36,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-14 03:12:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443484742] [2024-11-14 03:12:36,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:36,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:12:36,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:36,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:12:36,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:12:36,776 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:37,016 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-14 03:12:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:12:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 03:12:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:37,018 INFO L225 Difference]: With dead ends: 40 [2024-11-14 03:12:37,018 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 03:12:37,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:12:37,019 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:37,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 94 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 03:12:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-11-14 03:12:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-14 03:12:37,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2024-11-14 03:12:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:37,023 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-14 03:12:37,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-14 03:12:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:12:37,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:37,025 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2024-11-14 03:12:37,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:12:37,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:12:37,229 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:37,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2083439669, now seen corresponding path program 6 times [2024-11-14 03:12:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:37,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004587015] [2024-11-14 03:12:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:37,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:37,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004587015] [2024-11-14 03:12:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004587015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862782532] [2024-11-14 03:12:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:37,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:37,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:12:37,884 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:37,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:37,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:12:37,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:38,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:38,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:38,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:38,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:12:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:38,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862782532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:38,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907706580] [2024-11-14 03:12:38,313 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:38,313 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:38,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:38,314 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:38,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:39,151 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:40,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1577#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:40,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:40,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:40,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2024-11-14 03:12:40,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366099508] [2024-11-14 03:12:40,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:40,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:12:40,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:40,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:12:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:12:40,030 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:40,533 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-14 03:12:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:12:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 03:12:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:40,534 INFO L225 Difference]: With dead ends: 59 [2024-11-14 03:12:40,534 INFO L226 Difference]: Without dead ends: 38 [2024-11-14 03:12:40,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:12:40,536 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:40,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 166 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:12:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-14 03:12:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-14 03:12:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 03:12:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-14 03:12:40,540 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2024-11-14 03:12:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:40,540 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-14 03:12:40,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-14 03:12:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:12:40,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:40,541 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-11-14 03:12:40,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:12:40,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:12:40,746 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:40,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash 798588411, now seen corresponding path program 7 times [2024-11-14 03:12:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659265473] [2024-11-14 03:12:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:41,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659265473] [2024-11-14 03:12:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659265473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769323780] [2024-11-14 03:12:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:12:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:41,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:41,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:12:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:41,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 03:12:41,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:41,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:41,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:12:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769323780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:41,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786716575] [2024-11-14 03:12:41,776 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:41,776 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:41,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:41,776 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:41,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:42,522 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:43,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1902#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:43,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:43,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2024-11-14 03:12:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049476830] [2024-11-14 03:12:43,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:43,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:12:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:12:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:12:43,194 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:43,406 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-14 03:12:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:12:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-14 03:12:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:43,407 INFO L225 Difference]: With dead ends: 48 [2024-11-14 03:12:43,408 INFO L226 Difference]: Without dead ends: 48 [2024-11-14 03:12:43,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:12:43,409 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:43,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 108 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-14 03:12:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-11-14 03:12:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-11-14 03:12:43,413 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2024-11-14 03:12:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:43,413 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-11-14 03:12:43,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-11-14 03:12:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:12:43,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:43,414 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2024-11-14 03:12:43,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:12:43,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:12:43,615 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:43,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1594200345, now seen corresponding path program 8 times [2024-11-14 03:12:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:43,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197772519] [2024-11-14 03:12:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:43,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:44,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197772519] [2024-11-14 03:12:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197772519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15908981] [2024-11-14 03:12:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:44,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:44,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:12:44,289 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:12:44,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:44,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 03:12:44,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:44,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:44,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:44,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:44,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:12:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15908981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108925262] [2024-11-14 03:12:44,533 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:44,533 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:44,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:44,534 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:44,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:45,042 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:45,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2236#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:45,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:45,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:45,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2024-11-14 03:12:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893740709] [2024-11-14 03:12:45,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:45,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:12:45,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:12:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:12:45,665 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 03:12:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:46,075 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-11-14 03:12:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:12:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-14 03:12:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:46,076 INFO L225 Difference]: With dead ends: 73 [2024-11-14 03:12:46,076 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 03:12:46,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:12:46,077 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:46,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 177 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:12:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 03:12:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-14 03:12:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-11-14 03:12:46,081 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 37 [2024-11-14 03:12:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:46,081 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-11-14 03:12:46,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 03:12:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-11-14 03:12:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:12:46,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:46,082 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2024-11-14 03:12:46,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:46,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:12:46,287 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:46,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 737957559, now seen corresponding path program 9 times [2024-11-14 03:12:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693419559] [2024-11-14 03:12:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:46,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693419559] [2024-11-14 03:12:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693419559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976500730] [2024-11-14 03:12:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:46,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:46,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:46,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:12:46,938 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:46,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:46,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 03:12:46,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:46,949 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 03:12:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:47,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:47,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976500730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081930113] [2024-11-14 03:12:47,846 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:47,846 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:47,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:47,847 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:47,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:48,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:49,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2630#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:49,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:49,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-14 03:12:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154522411] [2024-11-14 03:12:49,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:49,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 03:12:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 03:12:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:12:49,107 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:49,573 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-11-14 03:12:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:12:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 03:12:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:49,575 INFO L225 Difference]: With dead ends: 56 [2024-11-14 03:12:49,576 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 03:12:49,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:12:49,578 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:49,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 273 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 03:12:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-11-14 03:12:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-14 03:12:49,586 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2024-11-14 03:12:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:49,587 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-14 03:12:49,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-14 03:12:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:12:49,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:49,588 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2024-11-14 03:12:49,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:12:49,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:12:49,788 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:49,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash -378688597, now seen corresponding path program 10 times [2024-11-14 03:12:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:49,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384565065] [2024-11-14 03:12:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:50,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384565065] [2024-11-14 03:12:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384565065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247347808] [2024-11-14 03:12:50,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:12:50,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:50,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:50,398 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:50,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:12:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:50,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:12:50,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:50,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:50,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:50,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:50,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:12:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247347808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063891343] [2024-11-14 03:12:50,821 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:50,821 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:50,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:50,822 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:50,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:51,626 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:52,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3026#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:52,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:52,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:52,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2024-11-14 03:12:52,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918031238] [2024-11-14 03:12:52,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:52,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:12:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:12:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:12:52,320 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:52,825 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2024-11-14 03:12:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:12:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-14 03:12:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:52,827 INFO L225 Difference]: With dead ends: 87 [2024-11-14 03:12:52,827 INFO L226 Difference]: Without dead ends: 54 [2024-11-14 03:12:52,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:12:52,828 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:52,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 265 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-14 03:12:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-14 03:12:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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 03:12:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-14 03:12:52,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2024-11-14 03:12:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:52,839 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-14 03:12:52,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-14 03:12:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:12:52,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:52,840 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2024-11-14 03:12:52,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:12:53,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:12:53,042 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:53,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1044489765, now seen corresponding path program 11 times [2024-11-14 03:12:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834325242] [2024-11-14 03:12:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:53,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:53,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834325242] [2024-11-14 03:12:53,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834325242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:53,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832943235] [2024-11-14 03:12:53,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:53,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:53,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:12:53,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:12:53,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:53,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 03:12:53,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:54,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:54,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:12:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:55,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832943235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:55,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368359709] [2024-11-14 03:12:55,049 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:55,050 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:55,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:55,050 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:55,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:55,755 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:56,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3492#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:12:56,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:56,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-11-14 03:12:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147102522] [2024-11-14 03:12:56,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:56,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 03:12:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 03:12:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:12:56,835 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 39 states, 38 states have (on average 3.263157894736842) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:57,345 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-11-14 03:12:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:12:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.263157894736842) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-14 03:12:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:57,346 INFO L225 Difference]: With dead ends: 64 [2024-11-14 03:12:57,347 INFO L226 Difference]: Without dead ends: 64 [2024-11-14 03:12:57,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 03:12:57,348 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:57,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 265 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:12:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-14 03:12:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-11-14 03:12:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-11-14 03:12:57,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 46 [2024-11-14 03:12:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:57,355 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-11-14 03:12:57,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.263157894736842) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-11-14 03:12:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 03:12:57,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:57,360 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2024-11-14 03:12:57,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:12:57,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:57,561 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:12:57,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -119275769, now seen corresponding path program 12 times [2024-11-14 03:12:57,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139067617] [2024-11-14 03:12:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 25 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:58,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139067617] [2024-11-14 03:12:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139067617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581636109] [2024-11-14 03:12:58,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:58,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:58,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:58,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:12:58,404 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:58,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:58,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:12:58,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:58,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:12:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 25 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:58,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:58,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:12:58,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:12:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 25 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:58,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581636109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46740649] [2024-11-14 03:12:58,683 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:12:58,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:58,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:58,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:58,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:59,314 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:00,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3946#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:00,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:00,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2024-11-14 03:13:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652667303] [2024-11-14 03:13:00,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:00,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:13:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:13:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:13:00,343 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:00,837 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2024-11-14 03:13:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:13:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 51 [2024-11-14 03:13:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:00,839 INFO L225 Difference]: With dead ends: 101 [2024-11-14 03:13:00,839 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 03:13:00,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 128 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:13:00,840 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:00,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 295 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:13:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 03:13:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-11-14 03:13:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-14 03:13:00,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 51 [2024-11-14 03:13:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:00,844 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-14 03:13:00,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-14 03:13:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:13:00,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:00,846 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2024-11-14 03:13:00,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:01,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:01,047 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:01,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1387529513, now seen corresponding path program 13 times [2024-11-14 03:13:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:01,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374592254] [2024-11-14 03:13:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:01,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374592254] [2024-11-14 03:13:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374592254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995839147] [2024-11-14 03:13:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:13:01,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:01,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:01,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:13:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:01,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:13:01,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:02,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:02,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:13:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:02,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995839147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:02,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541778227] [2024-11-14 03:13:02,704 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:02,704 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:02,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:02,705 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:02,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:03,279 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:04,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4468#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:04,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:04,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2024-11-14 03:13:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196684228] [2024-11-14 03:13:04,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:04,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:13:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:13:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:13:04,277 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:04,817 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-14 03:13:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:13:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-14 03:13:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:04,818 INFO L225 Difference]: With dead ends: 72 [2024-11-14 03:13:04,818 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 03:13:04,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 118 SyntacticMatches, 22 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:13:04,819 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:04,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 332 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:13:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 03:13:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-11-14 03:13:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 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 03:13:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-14 03:13:04,824 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 53 [2024-11-14 03:13:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:04,824 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-14 03:13:04,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-14 03:13:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 03:13:04,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:04,826 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1] [2024-11-14 03:13:04,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:05,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:13:05,030 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:05,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:05,030 INFO L85 PathProgramCache]: Analyzing trace with hash -220226677, now seen corresponding path program 14 times [2024-11-14 03:13:05,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:05,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345047824] [2024-11-14 03:13:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:05,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345047824] [2024-11-14 03:13:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345047824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579768146] [2024-11-14 03:13:05,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:13:05,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:05,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:05,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:05,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:13:06,030 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 03:13:06,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:06,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:13:06,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:06,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 03:13:12,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:13:12,148 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 03:13:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:12,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:14,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 03:13:14,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 03:13:14,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 03:13:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:14,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579768146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:14,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845251690] [2024-11-14 03:13:14,371 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:14,371 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:14,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:14,372 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:14,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:14,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:16,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5011#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:16,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:16,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:16,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 52 [2024-11-14 03:13:16,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915529588] [2024-11-14 03:13:16,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:16,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:13:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:13:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3216, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 03:13:16,477 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:38,601 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2024-11-14 03:13:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 03:13:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 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 58 [2024-11-14 03:13:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:38,603 INFO L225 Difference]: With dead ends: 127 [2024-11-14 03:13:38,604 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 03:13:38,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 110 SyntacticMatches, 24 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=817, Invalid=6155, Unknown=0, NotChecked=0, Total=6972 [2024-11-14 03:13:38,606 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 279 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:38,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 357 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:13:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 03:13:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2024-11-14 03:13:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-11-14 03:13:38,611 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 58 [2024-11-14 03:13:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:38,611 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-11-14 03:13:38,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-11-14 03:13:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 03:13:38,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:38,612 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1] [2024-11-14 03:13:38,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:13:38,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:13:38,816 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:38,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -9105625, now seen corresponding path program 15 times [2024-11-14 03:13:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268267665] [2024-11-14 03:13:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:39,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:39,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268267665] [2024-11-14 03:13:39,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268267665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:39,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508036465] [2024-11-14 03:13:39,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:13:39,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:39,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:39,610 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:39,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:13:39,782 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:13:39,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:39,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 03:13:39,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:39,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:13:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:39,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:40,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:13:40,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:13:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508036465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915711009] [2024-11-14 03:13:40,184 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:40,184 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:40,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:40,184 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:40,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:40,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:42,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5679#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:42,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:42,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:42,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 26 [2024-11-14 03:13:42,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753145900] [2024-11-14 03:13:42,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:42,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:13:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:13:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:13:42,071 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:42,831 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2024-11-14 03:13:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:13:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2024-11-14 03:13:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:42,832 INFO L225 Difference]: With dead ends: 129 [2024-11-14 03:13:42,832 INFO L226 Difference]: Without dead ends: 78 [2024-11-14 03:13:42,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 165 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:13:42,833 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:42,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 528 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:13:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-14 03:13:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-11-14 03:13:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-11-14 03:13:42,837 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 65 [2024-11-14 03:13:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:42,838 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-11-14 03:13:42,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-11-14 03:13:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 03:13:42,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:42,838 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1] [2024-11-14 03:13:42,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:13:43,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:13:43,041 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:43,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1760551177, now seen corresponding path program 16 times [2024-11-14 03:13:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763551436] [2024-11-14 03:13:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 49 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:43,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763551436] [2024-11-14 03:13:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763551436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690000614] [2024-11-14 03:13:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:13:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:43,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:43,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:13:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:43,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 03:13:43,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:44,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:44,658 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 5 treesize of output 3 [2024-11-14 03:13:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690000614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075078884] [2024-11-14 03:13:44,758 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:44,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:44,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:44,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:44,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:45,110 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:46,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6337#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:46,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:46,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 33 [2024-11-14 03:13:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831817665] [2024-11-14 03:13:46,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:46,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:13:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:13:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:13:46,343 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:46,875 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-11-14 03:13:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:13:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 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 67 [2024-11-14 03:13:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:46,877 INFO L225 Difference]: With dead ends: 88 [2024-11-14 03:13:46,877 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 03:13:46,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 28 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:13:46,878 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:46,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 427 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:13:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 03:13:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2024-11-14 03:13:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.146341463414634) internal successors, (94), 82 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2024-11-14 03:13:46,881 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 67 [2024-11-14 03:13:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:46,881 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2024-11-14 03:13:46,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 34 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2024-11-14 03:13:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 03:13:46,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:46,882 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1] [2024-11-14 03:13:46,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:13:47,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:47,082 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:47,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 682429291, now seen corresponding path program 17 times [2024-11-14 03:13:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577933218] [2024-11-14 03:13:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:48,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:48,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577933218] [2024-11-14 03:13:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577933218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:48,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594708820] [2024-11-14 03:13:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:13:48,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:48,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:48,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:13:48,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 03:13:48,331 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:48,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 03:13:48,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:48,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:13:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:48,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:48,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:13:48,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:13:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594708820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122826292] [2024-11-14 03:13:49,110 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:49,111 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:49,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:49,111 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:49,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:49,530 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:51,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6984#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:51,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 40 [2024-11-14 03:13:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557802962] [2024-11-14 03:13:51,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:51,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 03:13:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 03:13:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2142, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:13:51,563 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:53,396 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2024-11-14 03:13:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 03:13:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-14 03:13:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:53,397 INFO L225 Difference]: With dead ends: 143 [2024-11-14 03:13:53,397 INFO L226 Difference]: Without dead ends: 86 [2024-11-14 03:13:53,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 173 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=220, Invalid=4336, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 03:13:53,399 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:53,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 964 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:13:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-14 03:13:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2024-11-14 03:13:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-11-14 03:13:53,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 72 [2024-11-14 03:13:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:53,402 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-11-14 03:13:53,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-11-14 03:13:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 03:13:53,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:53,403 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2024-11-14 03:13:53,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:13:53,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:53,607 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:13:53,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1967624603, now seen corresponding path program 18 times [2024-11-14 03:13:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:53,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572467397] [2024-11-14 03:13:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 64 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:54,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572467397] [2024-11-14 03:13:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572467397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626515599] [2024-11-14 03:13:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:13:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:54,508 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:54,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:13:54,666 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:13:54,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:54,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 03:13:54,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:54,675 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 03:13:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:55,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:56,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626515599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:56,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890889970] [2024-11-14 03:13:56,654 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:56,654 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:56,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:56,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:56,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:57,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:58,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7755#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:13:58,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:58,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:58,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2024-11-14 03:13:58,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597510949] [2024-11-14 03:13:58,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:58,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 03:13:58,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 03:13:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3723, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:13:58,888 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 58 states, 57 states have (on average 3.017543859649123) internal successors, (172), 57 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:59,932 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2024-11-14 03:13:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:13:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.017543859649123) internal successors, (172), 57 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-14 03:13:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:59,933 INFO L225 Difference]: With dead ends: 96 [2024-11-14 03:13:59,933 INFO L226 Difference]: Without dead ends: 96 [2024-11-14 03:13:59,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 160 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=476, Invalid=3946, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 03:13:59,935 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:59,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 855 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:13:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-14 03:13:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2024-11-14 03:13:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-14 03:13:59,938 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 74 [2024-11-14 03:13:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:59,939 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-14 03:13:59,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.017543859649123) internal successors, (172), 57 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-14 03:13:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 03:13:59,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:59,940 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1] [2024-11-14 03:13:59,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:14:00,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:14:00,140 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:00,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash 891789127, now seen corresponding path program 19 times [2024-11-14 03:14:00,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:00,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939245835] [2024-11-14 03:14:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 41 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:01,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939245835] [2024-11-14 03:14:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939245835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:01,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19250220] [2024-11-14 03:14:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:01,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:01,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:01,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:14:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:01,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 03:14:01,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:01,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:14:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 41 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:02,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:02,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:14:02,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:14:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 41 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19250220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780350517] [2024-11-14 03:14:02,342 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:02,342 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:02,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:02,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:02,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:02,707 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:04,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:04,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:04,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 43 [2024-11-14 03:14:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160433845] [2024-11-14 03:14:04,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:04,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 03:14:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 03:14:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2430, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 03:14:04,688 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 44 states, 44 states have (on average 2.5) internal successors, (110), 43 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:06,606 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2024-11-14 03:14:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 03:14:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5) internal successors, (110), 43 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 79 [2024-11-14 03:14:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:06,607 INFO L225 Difference]: With dead ends: 157 [2024-11-14 03:14:06,607 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 03:14:06,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 191 SyntacticMatches, 22 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=236, Invalid=5020, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 03:14:06,609 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:06,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1128 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:14:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 03:14:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-11-14 03:14:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.141304347826087) internal successors, (105), 92 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-11-14 03:14:06,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 79 [2024-11-14 03:14:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:06,613 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-11-14 03:14:06,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5) internal successors, (110), 43 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-11-14 03:14:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 03:14:06,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:06,614 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1] [2024-11-14 03:14:06,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:06,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:06,814 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:06,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1090338025, now seen corresponding path program 20 times [2024-11-14 03:14:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:06,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231134571] [2024-11-14 03:14:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 81 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:07,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231134571] [2024-11-14 03:14:07,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231134571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236416090] [2024-11-14 03:14:07,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:07,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:07,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:14:08,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 03:14:08,063 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:08,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 03:14:08,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 100 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:08,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:09,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:14:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 100 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:09,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236416090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128929920] [2024-11-14 03:14:09,570 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:09,570 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:09,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:09,570 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:09,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:09,950 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:11,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9299#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:11,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:11,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 51 [2024-11-14 03:14:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489657795] [2024-11-14 03:14:11,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:11,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:14:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:14:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 03:14:11,456 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 53 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:12,000 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2024-11-14 03:14:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:14:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 0 states have call successors, (0), 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 81 [2024-11-14 03:14:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:12,001 INFO L225 Difference]: With dead ends: 104 [2024-11-14 03:14:12,001 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 03:14:12,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 174 SyntacticMatches, 34 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=559, Invalid=3101, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:14:12,002 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:12,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 462 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:14:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 03:14:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2024-11-14 03:14:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2024-11-14 03:14:12,006 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 81 [2024-11-14 03:14:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:12,006 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2024-11-14 03:14:12,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2024-11-14 03:14:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 03:14:12,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:12,007 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1] [2024-11-14 03:14:12,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:12,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:14:12,208 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:12,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 962329419, now seen corresponding path program 21 times [2024-11-14 03:14:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928641079] [2024-11-14 03:14:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:13,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928641079] [2024-11-14 03:14:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928641079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919673016] [2024-11-14 03:14:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:13,388 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:13,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:14:13,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:13,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:13,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 03:14:13,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:13,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:14:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:13,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:13,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:14:13,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:14:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:14,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919673016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:14,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114658193] [2024-11-14 03:14:14,016 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:14,016 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:14,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:14,017 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:14,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:14,430 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:16,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10054#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:16,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:16,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:16,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 32 [2024-11-14 03:14:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620437702] [2024-11-14 03:14:16,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:16,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 03:14:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 03:14:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:14:16,066 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:17,266 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2024-11-14 03:14:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 03:14:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-14 03:14:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:17,267 INFO L225 Difference]: With dead ends: 171 [2024-11-14 03:14:17,267 INFO L226 Difference]: Without dead ends: 102 [2024-11-14 03:14:17,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 222 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:14:17,268 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:17,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 831 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:14:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-14 03:14:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-11-14 03:14:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.14) internal successors, (114), 100 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 03:14:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2024-11-14 03:14:17,272 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 86 [2024-11-14 03:14:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:17,272 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2024-11-14 03:14:17,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2024-11-14 03:14:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 03:14:17,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:17,273 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1] [2024-11-14 03:14:17,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:14:17,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:14:17,473 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:17,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash 590867835, now seen corresponding path program 22 times [2024-11-14 03:14:17,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532993174] [2024-11-14 03:14:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 100 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:18,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:18,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532993174] [2024-11-14 03:14:18,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532993174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:18,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591868311] [2024-11-14 03:14:18,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:18,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:18,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:18,799 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:18,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:14:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:18,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-14 03:14:18,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:19,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:20,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:14:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591868311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488922619] [2024-11-14 03:14:21,094 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:21,094 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:21,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:21,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:21,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:21,442 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:23,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10931#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:23,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:23,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:23,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2024-11-14 03:14:23,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718262110] [2024-11-14 03:14:23,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:23,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 03:14:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 03:14:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3475, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:14:23,439 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 55 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:24,417 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2024-11-14 03:14:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:14:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 55 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-14 03:14:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:24,418 INFO L225 Difference]: With dead ends: 112 [2024-11-14 03:14:24,418 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 03:14:24,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 191 SyntacticMatches, 37 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=458, Invalid=3574, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 03:14:24,419 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:24,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 818 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:14:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 03:14:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-11-14 03:14:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2024-11-14 03:14:24,423 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 88 [2024-11-14 03:14:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:24,423 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2024-11-14 03:14:24,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.2181818181818183) internal successors, (177), 55 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2024-11-14 03:14:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 03:14:24,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:24,425 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1] [2024-11-14 03:14:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:24,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:24,625 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:24,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2072662169, now seen corresponding path program 23 times [2024-11-14 03:14:24,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:24,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293527568] [2024-11-14 03:14:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 49 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:25,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:25,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293527568] [2024-11-14 03:14:25,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293527568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:25,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045976837] [2024-11-14 03:14:25,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:25,684 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:14:26,092 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 03:14:26,092 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:26,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 03:14:26,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:26,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:14:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 49 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:26,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:26,382 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 03:14:26,384 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 03:14:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 49 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045976837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730906385] [2024-11-14 03:14:26,498 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:26,498 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:26,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:26,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:26,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:26,844 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:28,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11745#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:28,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:28,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2024-11-14 03:14:28,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162138333] [2024-11-14 03:14:28,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:28,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:14:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:14:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:14:28,699 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 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 03:14:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:30,165 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2024-11-14 03:14:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 03:14:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 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 93 [2024-11-14 03:14:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:30,166 INFO L225 Difference]: With dead ends: 185 [2024-11-14 03:14:30,166 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 03:14:30,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 242 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=147, Invalid=2609, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:14:30,167 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:30,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1089 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:14:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 03:14:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2024-11-14 03:14:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 108 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 03:14:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2024-11-14 03:14:30,170 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 93 [2024-11-14 03:14:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:30,170 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2024-11-14 03:14:30,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 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 03:14:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2024-11-14 03:14:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:14:30,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:30,171 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1] [2024-11-14 03:14:30,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:14:30,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:30,372 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:30,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 886957879, now seen corresponding path program 24 times [2024-11-14 03:14:30,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:30,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273511210] [2024-11-14 03:14:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:30,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 121 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:31,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273511210] [2024-11-14 03:14:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273511210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216375215] [2024-11-14 03:14:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:31,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:31,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:31,434 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:31,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:14:31,663 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:31,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:31,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 03:14:31,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:31,673 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 03:14:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 144 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:32,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 144 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216375215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125816009] [2024-11-14 03:14:34,568 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:34,568 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:34,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:34,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:34,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:34,984 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:37,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12707#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:37,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:37,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:37,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2024-11-14 03:14:37,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706112205] [2024-11-14 03:14:37,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:37,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-14 03:14:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-14 03:14:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=5649, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:14:37,492 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 73 states, 72 states have (on average 3.0555555555555554) internal successors, (220), 72 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:38,942 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2024-11-14 03:14:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:14:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.0555555555555554) internal successors, (220), 72 states have internal predecessors, (220), 0 states have call successors, (0), 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 95 [2024-11-14 03:14:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:38,943 INFO L225 Difference]: With dead ends: 120 [2024-11-14 03:14:38,943 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 03:14:38,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 208 SyntacticMatches, 26 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3398 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=719, Invalid=5923, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 03:14:38,945 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 153 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:38,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1312 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:14:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 03:14:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2024-11-14 03:14:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1403508771929824) internal successors, (130), 114 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2024-11-14 03:14:38,950 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 95 [2024-11-14 03:14:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:38,950 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2024-11-14 03:14:38,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.0555555555555554) internal successors, (220), 72 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2024-11-14 03:14:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 03:14:38,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:38,951 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1] [2024-11-14 03:14:38,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:14:39,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:39,152 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:39,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -646812885, now seen corresponding path program 25 times [2024-11-14 03:14:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701652096] [2024-11-14 03:14:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:40,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701652096] [2024-11-14 03:14:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701652096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850902577] [2024-11-14 03:14:40,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:40,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:40,283 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:40,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:14:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:40,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-14 03:14:40,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:40,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:14:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:40,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:40,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:14:40,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:14:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850902577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1410062682] [2024-11-14 03:14:40,865 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:40,865 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:40,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:40,865 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:40,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:41,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:43,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13583#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:43,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:43,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 35 [2024-11-14 03:14:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309722657] [2024-11-14 03:14:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:43,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 03:14:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 03:14:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:14:43,193 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:44,721 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2024-11-14 03:14:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 03:14:44,721 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 0 states have call successors, (0), 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 03:14:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:44,722 INFO L225 Difference]: With dead ends: 199 [2024-11-14 03:14:44,722 INFO L226 Difference]: Without dead ends: 118 [2024-11-14 03:14:44,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 261 SyntacticMatches, 28 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=155, Invalid=2925, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:14:44,723 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:44,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1217 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:14:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-14 03:14:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-11-14 03:14:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 116 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2024-11-14 03:14:44,726 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 100 [2024-11-14 03:14:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:44,726 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2024-11-14 03:14:44,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2024-11-14 03:14:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:14:44,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:44,727 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1] [2024-11-14 03:14:44,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:14:44,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:44,928 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:44,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash 732088667, now seen corresponding path program 26 times [2024-11-14 03:14:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:44,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976042092] [2024-11-14 03:14:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 144 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:46,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:46,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976042092] [2024-11-14 03:14:46,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976042092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:46,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044739478] [2024-11-14 03:14:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:46,034 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:46,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:14:46,352 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-14 03:14:46,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:46,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 03:14:46,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:47,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:48,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:14:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044739478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284464509] [2024-11-14 03:14:48,322 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:48,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:48,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:48,323 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:48,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:48,729 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:51,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14603#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:51,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:51,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 63 [2024-11-14 03:14:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106038851] [2024-11-14 03:14:51,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:51,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 03:14:51,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 03:14:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=4306, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 03:14:51,146 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 65 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:51,951 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2024-11-14 03:14:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 03:14:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-14 03:14:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:51,952 INFO L225 Difference]: With dead ends: 128 [2024-11-14 03:14:51,952 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 03:14:51,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 222 SyntacticMatches, 43 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3528 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=823, Invalid=4433, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 03:14:51,953 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:51,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 828 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 03:14:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2024-11-14 03:14:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.139344262295082) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2024-11-14 03:14:51,956 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 102 [2024-11-14 03:14:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:51,956 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2024-11-14 03:14:51,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2024-11-14 03:14:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 03:14:51,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:51,957 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1] [2024-11-14 03:14:51,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:14:52,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:52,157 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:52,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1641627527, now seen corresponding path program 27 times [2024-11-14 03:14:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:52,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545403019] [2024-11-14 03:14:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 57 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:53,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:53,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545403019] [2024-11-14 03:14:53,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545403019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:53,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686286835] [2024-11-14 03:14:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:53,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:53,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:53,457 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:53,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:14:53,763 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:53,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:53,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-14 03:14:53,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:53,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:14:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 57 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:53,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:54,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:14:54,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:14:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 57 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:54,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686286835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096306932] [2024-11-14 03:14:54,203 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:54,203 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:54,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:54,203 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:54,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:54,610 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:56,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15537#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:14:56,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:56,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:56,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 37 [2024-11-14 03:14:56,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333859516] [2024-11-14 03:14:56,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:56,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:14:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:14:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:14:56,694 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:58,414 INFO L93 Difference]: Finished difference Result 213 states and 243 transitions. [2024-11-14 03:14:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 03:14:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-14 03:14:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:58,415 INFO L225 Difference]: With dead ends: 213 [2024-11-14 03:14:58,415 INFO L226 Difference]: Without dead ends: 126 [2024-11-14 03:14:58,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 280 SyntacticMatches, 30 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 03:14:58,416 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2956 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:58,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1394 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2956 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:14:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-14 03:14:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2024-11-14 03:14:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2024-11-14 03:14:58,419 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 107 [2024-11-14 03:14:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:58,420 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2024-11-14 03:14:58,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2024-11-14 03:14:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:14:58,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:58,421 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1] [2024-11-14 03:14:58,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:14:58,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:58,621 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:14:58,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1650166615, now seen corresponding path program 28 times [2024-11-14 03:14:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901150267] [2024-11-14 03:14:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 169 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:59,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:59,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901150267] [2024-11-14 03:14:59,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901150267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:59,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189042319] [2024-11-14 03:14:59,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:59,966 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:59,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:15:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:00,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 03:15:00,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 196 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:00,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:01,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:15:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 196 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189042319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797312485] [2024-11-14 03:15:02,341 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:02,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:02,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:02,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:02,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:02,680 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:04,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16627#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:15:04,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:04,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:04,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2024-11-14 03:15:04,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763426893] [2024-11-14 03:15:04,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:04,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 03:15:04,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 03:15:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=5062, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:15:04,861 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand has 69 states, 68 states have (on average 3.2941176470588234) internal successors, (224), 68 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:06,157 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2024-11-14 03:15:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 03:15:06,157 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.2941176470588234) internal successors, (224), 68 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-14 03:15:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:06,158 INFO L225 Difference]: With dead ends: 136 [2024-11-14 03:15:06,158 INFO L226 Difference]: Without dead ends: 136 [2024-11-14 03:15:06,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 237 SyntacticMatches, 46 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=671, Invalid=5181, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 03:15:06,159 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 193 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:06,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1134 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:15:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-14 03:15:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2024-11-14 03:15:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 130 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2024-11-14 03:15:06,162 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 109 [2024-11-14 03:15:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:06,162 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2024-11-14 03:15:06,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.2941176470588234) internal successors, (224), 68 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2024-11-14 03:15:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:15:06,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:06,163 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1] [2024-11-14 03:15:06,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:15:06,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:06,364 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:15:06,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1552524533, now seen corresponding path program 29 times [2024-11-14 03:15:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815385637] [2024-11-14 03:15:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:06,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 61 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:08,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815385637] [2024-11-14 03:15:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815385637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580099950] [2024-11-14 03:15:08,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:08,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:08,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:08,046 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:08,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:15:08,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 03:15:08,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:08,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-14 03:15:08,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:08,776 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 03:15:09,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 03:15:20,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:15:20,361 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 03:15:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 196 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:20,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:24,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 03:15:24,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 03:15:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 196 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580099950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636759231] [2024-11-14 03:15:25,604 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:25,604 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:25,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:25,605 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:25,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:25,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:29,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17690#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:15:29,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:29,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:29,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 108 [2024-11-14 03:15:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551258685] [2024-11-14 03:15:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:29,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-14 03:15:29,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-14 03:15:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=12061, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:15:29,772 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 109 states, 109 states have (on average 3.1376146788990824) internal successors, (342), 108 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:33,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:15:41,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:15:43,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:15:45,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:15:54,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:15:56,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:16:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:53,550 INFO L93 Difference]: Finished difference Result 239 states and 273 transitions. [2024-11-14 03:16:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:16:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.1376146788990824) internal successors, (342), 108 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-14 03:16:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:53,551 INFO L225 Difference]: With dead ends: 239 [2024-11-14 03:16:53,551 INFO L226 Difference]: Without dead ends: 146 [2024-11-14 03:16:53,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 233 SyntacticMatches, 32 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9239 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=2612, Invalid=21258, Unknown=0, NotChecked=0, Total=23870 [2024-11-14 03:16:53,552 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 468 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 169 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:53,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1365 Invalid, 3347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3172 Invalid, 6 Unknown, 0 Unchecked, 14.1s Time] [2024-11-14 03:16:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-14 03:16:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2024-11-14 03:16:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2024-11-14 03:16:53,556 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 114 [2024-11-14 03:16:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:53,557 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2024-11-14 03:16:53,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.1376146788990824) internal successors, (342), 108 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:16:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2024-11-14 03:16:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 03:16:53,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:53,558 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1] [2024-11-14 03:16:53,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 03:16:53,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 03:16:53,758 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:16:53,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -338931801, now seen corresponding path program 30 times [2024-11-14 03:16:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:53,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757964541] [2024-11-14 03:16:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:53,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 65 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:55,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757964541] [2024-11-14 03:16:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757964541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093482264] [2024-11-14 03:16:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:16:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:55,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:55,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 03:16:55,610 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:16:55,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:55,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-14 03:16:55,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:55,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:16:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 65 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:55,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:55,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:16:55,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:16:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 65 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:56,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093482264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560469584] [2024-11-14 03:16:56,107 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:16:56,107 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:56,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:56,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:56,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:56,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:59,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18918#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:16:59,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:59,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:59,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 41 [2024-11-14 03:16:59,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765184141] [2024-11-14 03:16:59,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:59,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:16:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:16:59,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2237, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:16:59,215 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 42 states, 42 states have (on average 3.0) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:01,599 INFO L93 Difference]: Finished difference Result 241 states and 275 transitions. [2024-11-14 03:17:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 03:17:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-11-14 03:17:01,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:01,600 INFO L225 Difference]: With dead ends: 241 [2024-11-14 03:17:01,600 INFO L226 Difference]: Without dead ends: 142 [2024-11-14 03:17:01,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 318 SyntacticMatches, 34 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=179, Invalid=3981, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:17:01,601 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 3860 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:01,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1833 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3860 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 03:17:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-14 03:17:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2024-11-14 03:17:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1357142857142857) internal successors, (159), 140 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2024-11-14 03:17:01,604 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 121 [2024-11-14 03:17:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:01,604 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2024-11-14 03:17:01,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2024-11-14 03:17:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:17:01,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:01,605 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1] [2024-11-14 03:17:01,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 03:17:01,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 03:17:01,805 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:01,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:01,805 INFO L85 PathProgramCache]: Analyzing trace with hash 724938615, now seen corresponding path program 31 times [2024-11-14 03:17:01,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:01,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182458733] [2024-11-14 03:17:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:01,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 225 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:03,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182458733] [2024-11-14 03:17:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182458733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103910109] [2024-11-14 03:17:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:03,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:03,232 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:03,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:17:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:03,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 03:17:03,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 256 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:03,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:04,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:17:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 256 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:05,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103910109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:05,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83463693] [2024-11-14 03:17:05,234 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:05,234 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:05,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:05,234 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:05,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:05,592 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:08,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20130#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:17:08,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:08,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 57 [2024-11-14 03:17:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471108787] [2024-11-14 03:17:08,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:08,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:17:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:17:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=3836, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 03:17:08,347 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 59 states, 58 states have (on average 3.6724137931034484) internal successors, (213), 58 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:10,054 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2024-11-14 03:17:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 03:17:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.6724137931034484) internal successors, (213), 58 states have internal predecessors, (213), 0 states have call successors, (0), 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 123 [2024-11-14 03:17:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:10,056 INFO L225 Difference]: With dead ends: 152 [2024-11-14 03:17:10,056 INFO L226 Difference]: Without dead ends: 152 [2024-11-14 03:17:10,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 288 SyntacticMatches, 52 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 03:17:10,057 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 250 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:10,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1331 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2820 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 03:17:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-14 03:17:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2024-11-14 03:17:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1369863013698631) internal successors, (166), 146 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 166 transitions. [2024-11-14 03:17:10,061 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 166 transitions. Word has length 123 [2024-11-14 03:17:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:10,061 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 166 transitions. [2024-11-14 03:17:10,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.6724137931034484) internal successors, (213), 58 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 166 transitions. [2024-11-14 03:17:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:17:10,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:10,062 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1] [2024-11-14 03:17:10,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 03:17:10,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:17:10,263 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:10,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -135410965, now seen corresponding path program 32 times [2024-11-14 03:17:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94131873] [2024-11-14 03:17:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:11,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94131873] [2024-11-14 03:17:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94131873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172546790] [2024-11-14 03:17:11,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:11,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:11,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:11,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 03:17:12,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-14 03:17:12,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:12,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-14 03:17:12,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:12,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:17:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:13,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:13,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:17:13,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:17:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172546790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131404121] [2024-11-14 03:17:13,446 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:13,447 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:13,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:13,447 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:13,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:13,813 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:16,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21245#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:17:16,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:16,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 44 [2024-11-14 03:17:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322752189] [2024-11-14 03:17:16,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:16,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 03:17:16,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 03:17:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2529, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:17:16,779 INFO L87 Difference]: Start difference. First operand 147 states and 166 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:19,408 INFO L93 Difference]: Finished difference Result 255 states and 291 transitions. [2024-11-14 03:17:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 03:17:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-14 03:17:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:19,409 INFO L225 Difference]: With dead ends: 255 [2024-11-14 03:17:19,409 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 03:17:19,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 336 SyntacticMatches, 36 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=187, Invalid=4369, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 03:17:19,410 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 19 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:19,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1945 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 03:17:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 03:17:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2024-11-14 03:17:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.135135135135135) internal successors, (168), 148 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 168 transitions. [2024-11-14 03:17:19,415 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 168 transitions. Word has length 128 [2024-11-14 03:17:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:19,415 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 168 transitions. [2024-11-14 03:17:19,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 168 transitions. [2024-11-14 03:17:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 03:17:19,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:19,416 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1] [2024-11-14 03:17:19,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 03:17:19,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:17:19,620 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:19,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 922747163, now seen corresponding path program 33 times [2024-11-14 03:17:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110551366] [2024-11-14 03:17:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 256 proven. 851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:21,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110551366] [2024-11-14 03:17:21,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110551366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912756376] [2024-11-14 03:17:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:21,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:21,073 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:21,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 03:17:21,491 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:21,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:21,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-14 03:17:21,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:21,504 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 03:17:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 289 proven. 818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:22,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 289 proven. 818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912756376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813121200] [2024-11-14 03:17:26,189 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:26,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:26,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:26,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:26,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:26,523 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:30,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22560#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:17:30,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:30,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 96 [2024-11-14 03:17:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117546446] [2024-11-14 03:17:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:30,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-14 03:17:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-14 03:17:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=9739, Unknown=0, NotChecked=0, Total=10920 [2024-11-14 03:17:30,982 INFO L87 Difference]: Start difference. First operand 149 states and 168 transitions. Second operand has 98 states, 97 states have (on average 3.0927835051546393) internal successors, (300), 97 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:33,146 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2024-11-14 03:17:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 03:17:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 3.0927835051546393) internal successors, (300), 97 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-14 03:17:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:33,147 INFO L225 Difference]: With dead ends: 160 [2024-11-14 03:17:33,147 INFO L226 Difference]: Without dead ends: 160 [2024-11-14 03:17:33,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 288 SyntacticMatches, 36 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6088 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1244, Invalid=10098, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 03:17:33,148 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 237 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:33,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1871 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 03:17:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-14 03:17:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2024-11-14 03:17:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1363636363636365) internal successors, (175), 154 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2024-11-14 03:17:33,152 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 130 [2024-11-14 03:17:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:33,152 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2024-11-14 03:17:33,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 3.0927835051546393) internal successors, (300), 97 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2024-11-14 03:17:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 03:17:33,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:33,153 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1] [2024-11-14 03:17:33,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 03:17:33,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 03:17:33,354 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:33,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 180936647, now seen corresponding path program 34 times [2024-11-14 03:17:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682343464] [2024-11-14 03:17:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:35,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682343464] [2024-11-14 03:17:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682343464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566785250] [2024-11-14 03:17:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:35,156 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:35,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 03:17:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:35,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-14 03:17:35,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:35,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:17:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:35,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:35,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:17:35,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:17:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:36,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566785250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:36,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [927276677] [2024-11-14 03:17:36,039 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:36,039 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:36,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:36,039 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:36,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:36,488 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:40,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23736#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:17:40,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:40,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:40,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 45 [2024-11-14 03:17:40,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749955511] [2024-11-14 03:17:40,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:40,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 03:17:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 03:17:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2633, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:17:40,219 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:43,192 INFO L93 Difference]: Finished difference Result 269 states and 307 transitions. [2024-11-14 03:17:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:17:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 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 135 [2024-11-14 03:17:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:43,193 INFO L225 Difference]: With dead ends: 269 [2024-11-14 03:17:43,193 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 03:17:43,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 356 SyntacticMatches, 38 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=195, Invalid=4775, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:17:43,194 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 21 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4490 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 4526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:43,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2112 Invalid, 4526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4490 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 03:17:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 03:17:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2024-11-14 03:17:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2024-11-14 03:17:43,198 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 135 [2024-11-14 03:17:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:43,199 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2024-11-14 03:17:43,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2024-11-14 03:17:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 03:17:43,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:43,200 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1] [2024-11-14 03:17:43,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 03:17:43,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 03:17:43,400 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:43,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 220615575, now seen corresponding path program 35 times [2024-11-14 03:17:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:43,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324601724] [2024-11-14 03:17:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 289 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:45,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324601724] [2024-11-14 03:17:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324601724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739939167] [2024-11-14 03:17:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:17:45,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:45,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:45,411 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:45,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 03:17:46,012 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 03:17:46,012 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:46,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 03:17:46,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 324 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:48,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:50,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:17:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 324 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739939167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:51,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844413511] [2024-11-14 03:17:51,175 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:51,175 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:51,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:51,175 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:51,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:51,516 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:55,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25125#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:17:55,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:55,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 102 [2024-11-14 03:17:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172286719] [2024-11-14 03:17:55,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:55,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-14 03:17:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-14 03:17:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1742, Invalid=10468, Unknown=0, NotChecked=0, Total=12210 [2024-11-14 03:17:55,330 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 104 states, 103 states have (on average 3.6019417475728157) internal successors, (371), 103 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:57,023 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2024-11-14 03:17:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 03:17:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 3.6019417475728157) internal successors, (371), 103 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2024-11-14 03:17:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:57,024 INFO L225 Difference]: With dead ends: 168 [2024-11-14 03:17:57,025 INFO L226 Difference]: Without dead ends: 168 [2024-11-14 03:17:57,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 282 SyntacticMatches, 58 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11232 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1783, Invalid=10649, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 03:17:57,026 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 253 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:57,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1332 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:17:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-14 03:17:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2024-11-14 03:17:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1358024691358024) internal successors, (184), 162 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 184 transitions. [2024-11-14 03:17:57,029 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 184 transitions. Word has length 137 [2024-11-14 03:17:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:57,030 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 184 transitions. [2024-11-14 03:17:57,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 3.6019417475728157) internal successors, (371), 103 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 184 transitions. [2024-11-14 03:17:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-14 03:17:57,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:57,031 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1] [2024-11-14 03:17:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:57,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:57,232 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:17:57,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -580994357, now seen corresponding path program 36 times [2024-11-14 03:17:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:57,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783479631] [2024-11-14 03:17:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:59,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:59,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783479631] [2024-11-14 03:17:59,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783479631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:59,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952307467] [2024-11-14 03:17:59,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:59,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:59,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:59,582 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:59,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 03:18:00,160 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:00,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:00,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-14 03:18:00,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:01,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:18:01,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 03:18:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:01,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:01,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:18:01,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:18:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952307467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506569647] [2024-11-14 03:18:01,980 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:18:01,980 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:01,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:01,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:01,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:02,442 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:06,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26381#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:18:06,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:06,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 69 [2024-11-14 03:18:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631745382] [2024-11-14 03:18:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:06,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 03:18:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 03:18:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 03:18:06,768 INFO L87 Difference]: Start difference. First operand 163 states and 184 transitions. Second operand has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 69 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:11,088 INFO L93 Difference]: Finished difference Result 283 states and 323 transitions. [2024-11-14 03:18:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 03:18:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 69 states have internal predecessors, (191), 0 states have call successors, (0), 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 142 [2024-11-14 03:18:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:11,089 INFO L225 Difference]: With dead ends: 283 [2024-11-14 03:18:11,089 INFO L226 Difference]: Without dead ends: 166 [2024-11-14 03:18:11,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 353 SyntacticMatches, 40 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=300, Invalid=9012, Unknown=0, NotChecked=0, Total=9312 [2024-11-14 03:18:11,089 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 23 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2922 SdHoareTripleChecker+Invalid, 6198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:11,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2922 Invalid, 6198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 6160 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:18:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-14 03:18:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2024-11-14 03:18:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 164 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 03:18:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-11-14 03:18:11,092 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 142 [2024-11-14 03:18:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:11,093 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-11-14 03:18:11,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 69 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-11-14 03:18:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:18:11,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:11,094 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1] [2024-11-14 03:18:11,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 03:18:11,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 03:18:11,295 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:18:11,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1987992827, now seen corresponding path program 37 times [2024-11-14 03:18:11,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:11,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257636397] [2024-11-14 03:18:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 324 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:13,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257636397] [2024-11-14 03:18:13,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257636397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666486195] [2024-11-14 03:18:13,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:13,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:13,237 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:13,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 03:18:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:13,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-14 03:18:13,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 361 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:13,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:15,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:18:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 361 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666486195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:15,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76889989] [2024-11-14 03:18:15,855 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:18:15,855 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:15,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:15,855 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:15,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:16,196 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:20,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27802#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:18:20,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:20,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:20,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 66 [2024-11-14 03:18:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247144949] [2024-11-14 03:18:20,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:20,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 03:18:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 03:18:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=4964, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 03:18:20,124 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 68 states, 67 states have (on average 3.716417910447761) internal successors, (249), 67 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:22,486 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2024-11-14 03:18:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 03:18:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.716417910447761) internal successors, (249), 67 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2024-11-14 03:18:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:22,488 INFO L225 Difference]: With dead ends: 176 [2024-11-14 03:18:22,488 INFO L226 Difference]: Without dead ends: 176 [2024-11-14 03:18:22,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 339 SyntacticMatches, 61 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=609, Invalid=5091, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:18:22,489 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 330 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:22,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1852 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 03:18:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-14 03:18:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2024-11-14 03:18:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 170 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2024-11-14 03:18:22,492 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 144 [2024-11-14 03:18:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:22,493 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2024-11-14 03:18:22,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.716417910447761) internal successors, (249), 67 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2024-11-14 03:18:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:18:22,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:22,494 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1] [2024-11-14 03:18:22,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-14 03:18:22,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 03:18:22,694 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:18:22,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1857490969, now seen corresponding path program 38 times [2024-11-14 03:18:22,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:22,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089386819] [2024-11-14 03:18:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:24,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089386819] [2024-11-14 03:18:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089386819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63778122] [2024-11-14 03:18:24,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:24,604 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:24,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 03:18:25,845 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-14 03:18:25,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:25,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-14 03:18:25,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:25,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:18:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:26,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:26,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:18:26,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:18:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63778122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203724171] [2024-11-14 03:18:26,529 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:18:26,529 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:26,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:26,529 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:26,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:26,888 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:30,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29096#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:18:30,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:30,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:30,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 49 [2024-11-14 03:18:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890728242] [2024-11-14 03:18:30,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:30,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:18:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:18:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=3061, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 03:18:30,864 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand has 50 states, 50 states have (on average 3.08) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:34,347 INFO L93 Difference]: Finished difference Result 297 states and 339 transitions. [2024-11-14 03:18:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-14 03:18:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-11-14 03:18:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:34,349 INFO L225 Difference]: With dead ends: 297 [2024-11-14 03:18:34,349 INFO L226 Difference]: Without dead ends: 174 [2024-11-14 03:18:34,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 394 SyntacticMatches, 42 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=211, Invalid=5641, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 03:18:34,350 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 23 mSDsluCounter, 2708 mSDsCounter, 0 mSdLazyCounter, 5795 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:34,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2769 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5795 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-14 03:18:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-14 03:18:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2024-11-14 03:18:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 172 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2024-11-14 03:18:34,353 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 149 [2024-11-14 03:18:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:34,354 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2024-11-14 03:18:34,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2024-11-14 03:18:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:18:34,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:34,355 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1] [2024-11-14 03:18:34,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 03:18:34,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 03:18:34,556 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:18:34,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1072134071, now seen corresponding path program 39 times [2024-11-14 03:18:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:34,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892354373] [2024-11-14 03:18:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:34,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 361 proven. 1151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:36,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892354373] [2024-11-14 03:18:36,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892354373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61646087] [2024-11-14 03:18:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:18:36,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:36,363 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:36,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 03:18:36,759 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:18:36,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:36,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-14 03:18:36,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:36,772 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 03:18:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 400 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:38,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 400 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61646087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805276893] [2024-11-14 03:18:43,011 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:18:43,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:43,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:43,011 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:43,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:43,347 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:18:50,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30626#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:18:50,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:18:50,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:18:50,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 111 [2024-11-14 03:18:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872146296] [2024-11-14 03:18:50,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:18:50,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-14 03:18:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:18:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-14 03:18:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=12721, Unknown=0, NotChecked=0, Total=14280 [2024-11-14 03:18:50,009 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 113 states, 112 states have (on average 3.107142857142857) internal successors, (348), 112 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:18:53,166 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2024-11-14 03:18:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 03:18:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.107142857142857) internal successors, (348), 112 states have internal predecessors, (348), 0 states have call successors, (0), 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 151 [2024-11-14 03:18:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:18:53,168 INFO L225 Difference]: With dead ends: 184 [2024-11-14 03:18:53,168 INFO L226 Difference]: Without dead ends: 184 [2024-11-14 03:18:53,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 336 SyntacticMatches, 42 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8074 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1631, Invalid=13131, Unknown=0, NotChecked=0, Total=14762 [2024-11-14 03:18:53,168 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 367 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 4603 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 4604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:18:53,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 2227 Invalid, 4604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4603 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 03:18:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-14 03:18:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2024-11-14 03:18:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1348314606741574) internal successors, (202), 178 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 202 transitions. [2024-11-14 03:18:53,171 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 202 transitions. Word has length 151 [2024-11-14 03:18:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:18:53,172 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 202 transitions. [2024-11-14 03:18:53,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.107142857142857) internal successors, (348), 112 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:18:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 202 transitions. [2024-11-14 03:18:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-14 03:18:53,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:18:53,173 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1] [2024-11-14 03:18:53,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 03:18:53,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 03:18:53,373 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:18:53,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:18:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash -531682645, now seen corresponding path program 40 times [2024-11-14 03:18:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:18:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495567111] [2024-11-14 03:18:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:18:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:18:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:55,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495567111] [2024-11-14 03:18:55,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495567111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209137676] [2024-11-14 03:18:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:18:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:55,689 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:55,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 03:18:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:56,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-14 03:18:56,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:56,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:18:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:56,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:18:56,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:18:56,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:18:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209137676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:18:57,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146862592] [2024-11-14 03:18:57,090 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:18:57,090 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:18:57,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:18:57,090 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:18:57,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:18:57,474 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:02,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31982#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:19:02,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:02,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:02,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 51 [2024-11-14 03:19:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866151922] [2024-11-14 03:19:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:02,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 03:19:02,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 03:19:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3287, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 03:19:02,187 INFO L87 Difference]: Start difference. First operand 179 states and 202 transitions. Second operand has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:06,510 INFO L93 Difference]: Finished difference Result 311 states and 355 transitions. [2024-11-14 03:19:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 03:19:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 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 156 [2024-11-14 03:19:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:06,511 INFO L225 Difference]: With dead ends: 311 [2024-11-14 03:19:06,511 INFO L226 Difference]: Without dead ends: 182 [2024-11-14 03:19:06,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 413 SyntacticMatches, 44 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=219, Invalid=6101, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:19:06,512 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 24 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 6206 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2969 SdHoareTripleChecker+Invalid, 6248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:06,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2969 Invalid, 6248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6206 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 03:19:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-14 03:19:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2024-11-14 03:19:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1333333333333333) internal successors, (204), 180 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 204 transitions. [2024-11-14 03:19:06,516 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 204 transitions. Word has length 156 [2024-11-14 03:19:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:06,517 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 204 transitions. [2024-11-14 03:19:06,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 204 transitions. [2024-11-14 03:19:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 03:19:06,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:06,518 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2024-11-14 03:19:06,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 03:19:06,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 03:19:06,722 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:19:06,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1234122971, now seen corresponding path program 41 times [2024-11-14 03:19:06,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:06,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337740470] [2024-11-14 03:19:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:06,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 400 proven. 1261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:09,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337740470] [2024-11-14 03:19:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337740470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657594785] [2024-11-14 03:19:09,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:09,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:09,538 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:09,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 03:19:11,002 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 03:19:11,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:11,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 03:19:11,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 441 proven. 1220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:14,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:17,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 03:19:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 441 proven. 1220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657594785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423136593] [2024-11-14 03:19:18,716 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:19:18,716 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:18,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:18,716 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:18,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:19,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:24,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33584#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:19:24,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:24,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:24,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 117 [2024-11-14 03:19:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644836468] [2024-11-14 03:19:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:24,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-14 03:19:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-14 03:19:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=13477, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 03:19:24,335 INFO L87 Difference]: Start difference. First operand 181 states and 204 transitions. Second operand has 119 states, 118 states have (on average 3.6271186440677967) internal successors, (428), 118 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:25,999 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2024-11-14 03:19:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 03:19:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.6271186440677967) internal successors, (428), 118 states have internal predecessors, (428), 0 states have call successors, (0), 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 158 [2024-11-14 03:19:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:26,000 INFO L225 Difference]: With dead ends: 192 [2024-11-14 03:19:26,000 INFO L226 Difference]: Without dead ends: 192 [2024-11-14 03:19:26,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 328 SyntacticMatches, 67 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14842 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2320, Invalid=13682, Unknown=0, NotChecked=0, Total=16002 [2024-11-14 03:19:26,001 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 230 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:26,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1559 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2739 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:19:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-14 03:19:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2024-11-14 03:19:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.1344086021505377) internal successors, (211), 186 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 211 transitions. [2024-11-14 03:19:26,004 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 211 transitions. Word has length 158 [2024-11-14 03:19:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:26,004 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 211 transitions. [2024-11-14 03:19:26,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.6271186440677967) internal successors, (428), 118 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 211 transitions. [2024-11-14 03:19:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-14 03:19:26,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:26,005 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1] [2024-11-14 03:19:26,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 03:19:26,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 03:19:26,206 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:19:26,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1539735559, now seen corresponding path program 42 times [2024-11-14 03:19:26,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:26,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363907557] [2024-11-14 03:19:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:28,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363907557] [2024-11-14 03:19:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363907557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699786584] [2024-11-14 03:19:28,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:19:28,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:28,611 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:28,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 03:19:29,175 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:19:29,175 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:29,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-14 03:19:29,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:29,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 03:19:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:29,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:29,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 03:19:29,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 03:19:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699786584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:29,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585483573] [2024-11-14 03:19:29,890 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:19:29,890 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:29,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:29,890 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:29,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:30,314 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:34,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34998#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:19:34,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:34,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2024-11-14 03:19:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392467849] [2024-11-14 03:19:34,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:34,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 03:19:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 03:19:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=3521, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:19:34,803 INFO L87 Difference]: Start difference. First operand 187 states and 211 transitions. Second operand has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:38,728 INFO L93 Difference]: Finished difference Result 325 states and 371 transitions. [2024-11-14 03:19:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 03:19:38,728 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2024-11-14 03:19:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:38,729 INFO L225 Difference]: With dead ends: 325 [2024-11-14 03:19:38,729 INFO L226 Difference]: Without dead ends: 190 [2024-11-14 03:19:38,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 432 SyntacticMatches, 46 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=227, Invalid=6579, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 03:19:38,730 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 25 mSDsluCounter, 3041 mSDsCounter, 0 mSdLazyCounter, 6561 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 6605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:38,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3108 Invalid, 6605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6561 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 03:19:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-14 03:19:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2024-11-14 03:19:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.1329787234042554) internal successors, (213), 188 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 213 transitions. [2024-11-14 03:19:38,733 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 213 transitions. Word has length 163 [2024-11-14 03:19:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:38,733 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 213 transitions. [2024-11-14 03:19:38,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.111111111111111) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 213 transitions. [2024-11-14 03:19:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-14 03:19:38,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:38,734 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1] [2024-11-14 03:19:38,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 03:19:38,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 03:19:38,935 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:19:38,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash -718070825, now seen corresponding path program 43 times [2024-11-14 03:19:38,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:38,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024769107] [2024-11-14 03:19:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 441 proven. 1376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:41,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:41,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024769107] [2024-11-14 03:19:41,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024769107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:41,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557898581] [2024-11-14 03:19:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:19:41,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:41,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:41,722 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:41,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 03:19:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:42,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-14 03:19:42,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 484 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:43,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:45,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 03:19:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 484 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557898581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176417425] [2024-11-14 03:19:46,782 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:19:46,782 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:46,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:46,783 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:46,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:47,158 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:52,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36648#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:19:52,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:52,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 99 [2024-11-14 03:19:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109019600] [2024-11-14 03:19:52,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:52,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-14 03:19:52,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-14 03:19:52,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=10238, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 03:19:52,139 INFO L87 Difference]: Start difference. First operand 189 states and 213 transitions. Second operand has 101 states, 100 states have (on average 3.36) internal successors, (336), 100 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:55,121 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2024-11-14 03:19:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 03:19:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 3.36) internal successors, (336), 100 states have internal predecessors, (336), 0 states have call successors, (0), 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 165 [2024-11-14 03:19:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:55,122 INFO L225 Difference]: With dead ends: 200 [2024-11-14 03:19:55,122 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 03:19:55,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 365 SyntacticMatches, 70 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11118 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1367, Invalid=10405, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 03:19:55,123 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 310 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 5266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 5267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:55,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 2489 Invalid, 5267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5266 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-14 03:19:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 03:19:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2024-11-14 03:19:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.134020618556701) internal successors, (220), 194 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 220 transitions. [2024-11-14 03:19:55,127 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 220 transitions. Word has length 165 [2024-11-14 03:19:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:55,127 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 220 transitions. [2024-11-14 03:19:55,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 3.36) internal successors, (336), 100 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:19:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 220 transitions. [2024-11-14 03:19:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-14 03:19:55,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:55,129 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1] [2024-11-14 03:19:55,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 03:19:55,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:55,329 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 03:19:55,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash -213575029, now seen corresponding path program 44 times [2024-11-14 03:19:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:55,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811033664] [2024-11-14 03:19:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:55,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 93 proven. 1840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:19:57,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811033664] [2024-11-14 03:19:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811033664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658031396] [2024-11-14 03:19:57,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:57,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:57,928 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:57,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7227f3-0599-4309-8e41-b2d82334075c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 03:20:00,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-14 03:20:00,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:20:00,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 03:20:00,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:01,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 03:20:33,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:20:33,206 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 03:20:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 484 proven. 1449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:20:33,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:42,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 03:20:42,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 03:20:42,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-14 03:20:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 484 proven. 1449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:20:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658031396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078618959] [2024-11-14 03:20:44,110 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:20:44,110 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:44,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:44,111 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:44,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:44,459 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:51,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38199#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0))' at error location [2024-11-14 03:20:51,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:51,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:51,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 132 [2024-11-14 03:20:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671979627] [2024-11-14 03:20:51,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:51,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-14 03:20:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-14 03:20:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1788, Invalid=17672, Unknown=0, NotChecked=0, Total=19460 [2024-11-14 03:20:51,670 INFO L87 Difference]: Start difference. First operand 195 states and 220 transitions. Second operand has 133 states, 133 states have (on average 3.473684210526316) internal successors, (462), 132 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:20:55,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:20:58,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:00,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:02,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:04,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:06,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:07,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:09,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:10,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:13,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:15,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:17,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:19,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:21:21,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:44,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:46,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:48,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:22:50,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:23:27,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:24:37,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:24:54,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:24:56,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:25:22,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:25:43,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:25:46,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:25:48,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]