./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff-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_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/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_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/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_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/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 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:18:42,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:18:42,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 05:18:42,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:18:42,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:18:42,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:18:42,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:18:42,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:18:42,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:18:42,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:18:42,863 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:18:42,863 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:18:42,863 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:18:42,863 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:18:42,864 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:18:42,865 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:18:42,865 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:18:42,865 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:18:42,865 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:18:42,865 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:18:42,865 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:18:42,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:18:42,866 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:18:42,866 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:18:42,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:18:42,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:18:42,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:18:42,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:18:42,868 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_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/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 -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2024-11-14 05:18:43,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:18:43,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:18:43,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:18:43,204 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:18:43,204 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:18:43,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i Unable to find full path for "g++" [2024-11-14 05:18:45,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:18:45,438 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:18:45,440 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2024-11-14 05:18:45,458 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/data/0303d0444/0b67bbbf3f014c9da1f9fe782e99cc98/FLAGe8b0a5594 [2024-11-14 05:18:45,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/data/0303d0444/0b67bbbf3f014c9da1f9fe782e99cc98 [2024-11-14 05:18:45,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:18:45,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:18:45,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:18:45,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:18:45,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:18:45,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:45,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599312c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45, skipping insertion in model container [2024-11-14 05:18:45,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:45,537 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:18:45,909 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 05:18:45,910 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 05:18:45,912 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 05:18:45,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:18:45,928 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:18:45,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:18:45,993 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:18:45,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45 WrapperNode [2024-11-14 05:18:45,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:18:45,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:18:45,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:18:45,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:18:46,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,033 INFO L138 Inliner]: procedures = 116, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-14 05:18:46,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:18:46,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:18:46,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:18:46,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:18:46,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,050 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:18:46,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:18:46,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:18:46,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:18:46,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (1/1) ... [2024-11-14 05:18:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:18:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:46,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:18:46,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:18:46,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:18:46,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:18:46,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:18:46,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:18:46,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:18:46,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:18:46,269 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:18:46,271 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:18:46,607 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-14 05:18:46,607 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:18:46,706 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:18:46,706 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:18:46,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:18:46 BoogieIcfgContainer [2024-11-14 05:18:46,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:18:46,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:18:46,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:18:46,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:18:46,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:18:45" (1/3) ... [2024-11-14 05:18:46,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db64d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:18:46, skipping insertion in model container [2024-11-14 05:18:46,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:18:45" (2/3) ... [2024-11-14 05:18:46,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db64d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:18:46, skipping insertion in model container [2024-11-14 05:18:46,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:18:46" (3/3) ... [2024-11-14 05:18:46,722 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2024-11-14 05:18:46,740 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:18:46,742 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG diff-alloca-2.i that has 1 procedures, 28 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-11-14 05:18:46,782 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:18:46,795 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;@2f31cec8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:18:46,795 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-14 05:18:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:18:46,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:46,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:18:46,806 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:46,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash 144888, now seen corresponding path program 1 times [2024-11-14 05:18:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157849226] [2024-11-14 05:18:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:47,344 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 05:18:47,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157849226] [2024-11-14 05:18:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157849226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:47,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:18:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260832940] [2024-11-14 05:18:47,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:47,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:18:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:18:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:18:47,382 INFO L87 Difference]: Start difference. First operand has 28 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 05:18:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:47,457 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 05:18:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:18:47,463 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 05:18:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:47,470 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:18:47,470 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 05:18:47,472 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 05:18:47,476 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:47,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 05:18:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 05:18:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 2.142857142857143) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 05:18:47,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 3 [2024-11-14 05:18:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:47,509 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 05:18:47,509 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 05:18:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 05:18:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:18:47,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:47,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:18:47,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:18:47,510 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:47,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash 144889, now seen corresponding path program 1 times [2024-11-14 05:18:47,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:47,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047530608] [2024-11-14 05:18:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:47,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:47,966 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 05:18:47,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047530608] [2024-11-14 05:18:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047530608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:18:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832612880] [2024-11-14 05:18:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:47,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:18:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:18:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:18:47,969 INFO L87 Difference]: Start difference. First operand 26 states and 30 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 05:18:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:48,120 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-14 05:18:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:18:48,122 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 05:18:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:48,123 INFO L225 Difference]: With dead ends: 28 [2024-11-14 05:18:48,123 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 05:18:48,123 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 05:18:48,124 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:48,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 05:18:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 05:18:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 2.0625) internal successors, (33), 27 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 05:18:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-14 05:18:48,129 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 3 [2024-11-14 05:18:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:48,129 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-14 05:18:48,129 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 05:18:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-14 05:18:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:18:48,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:48,130 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:18:48,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:18:48,130 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:48,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash 4579454, now seen corresponding path program 1 times [2024-11-14 05:18:48,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:48,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065049583] [2024-11-14 05:18:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:48,256 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 05:18:48,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:48,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065049583] [2024-11-14 05:18:48,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065049583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:48,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:48,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:18:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785862981] [2024-11-14 05:18:48,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:48,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:18:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:48,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:18:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:18:48,258 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:48,348 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 05:18:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:18:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 05:18:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:48,351 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:18:48,352 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:18:48,353 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 05:18:48,353 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:48,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:18:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 05:18:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 2.0) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-14 05:18:48,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 4 [2024-11-14 05:18:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:48,361 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-14 05:18:48,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-14 05:18:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:18:48,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:48,363 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:18:48,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:18:48,364 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:48,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 4579455, now seen corresponding path program 1 times [2024-11-14 05:18:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510660352] [2024-11-14 05:18:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:48,484 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 05:18:48,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510660352] [2024-11-14 05:18:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510660352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:48,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:48,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:18:48,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567106394] [2024-11-14 05:18:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:48,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:18:48,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:18:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:18:48,486 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:48,539 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 05:18:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:18:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 05:18:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:48,541 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:18:48,541 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:18:48,541 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 05:18:48,542 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:48,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:18:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:18:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 05:18:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.9375) 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 05:18:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 05:18:48,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2024-11-14 05:18:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:48,549 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 05:18:48,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 05:18:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:18:48,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:48,552 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 05:18:48,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:18:48,552 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:48,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 139314987, now seen corresponding path program 1 times [2024-11-14 05:18:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348135124] [2024-11-14 05:18:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:49,118 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 05:18:49,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:49,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348135124] [2024-11-14 05:18:49,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348135124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:49,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328681203] [2024-11-14 05:18:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:49,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:49,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:49,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:18:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:49,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:18:49,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:49,440 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-14 05:18:49,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-14 05:18:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:49,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:49,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:18:49,689 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 05:18:49,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:49,884 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 05:18:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328681203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:49,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402082894] [2024-11-14 05:18:49,905 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 05:18:49,905 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:49,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:49,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:49,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:51,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:52,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (= |ULTIMATE.start_main_~B~0#1.offset| 0) (= |ULTIMATE.start_main_~D~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_37| Int) (|v_ULTIMATE.start_main_~A~0#1.base_26| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~nondet13#1| 2147483647) (<= (select |#length| |v_ULTIMATE.start_main_~A~0#1.base_26|) (+ 3 (* |v_ULTIMATE.start_main_~i~1#1_37| 4))) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet13#1|)) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_~B~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~D~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_main_~A~0#1.base_26|) (<= 1 |ULTIMATE.start_main_~Alen~0#1|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_37|))))' at error location [2024-11-14 05:18:52,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:52,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 05:18:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488797813] [2024-11-14 05:18:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:52,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:18:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:18:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:18:52,092 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 05:18:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:52,366 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-14 05:18:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:18:52,367 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 05:18:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:52,368 INFO L225 Difference]: With dead ends: 26 [2024-11-14 05:18:52,368 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 05:18:52,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-14 05:18:52,370 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:52,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 95 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:18:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 05:18:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 05:18:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-14 05:18:52,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-11-14 05:18:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:52,374 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-14 05:18:52,374 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 05:18:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-14 05:18:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 05:18:52,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:52,375 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 05:18:52,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:52,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:52,580 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:52,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 23885197, now seen corresponding path program 1 times [2024-11-14 05:18:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574602439] [2024-11-14 05:18:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:52,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:52,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574602439] [2024-11-14 05:18:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574602439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:18:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956807835] [2024-11-14 05:18:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:52,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:18:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:18:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:18:52,955 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:53,063 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 05:18:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:18:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 05:18:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:53,064 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:18:53,064 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:18:53,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:18:53,065 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:53,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:18:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 05:18:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-14 05:18:53,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 6 [2024-11-14 05:18:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:53,070 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-14 05:18:53,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-14 05:18:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:18:53,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:53,070 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:53,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:18:53,073 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:53,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 740513652, now seen corresponding path program 1 times [2024-11-14 05:18:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283855010] [2024-11-14 05:18:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:53,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283855010] [2024-11-14 05:18:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283855010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618560249] [2024-11-14 05:18:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:53,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:53,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:53,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:53,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:18:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:53,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:18:53,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:53,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618560249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:53,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105393540] [2024-11-14 05:18:53,398 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 05:18:53,398 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:53,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:53,398 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:53,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:54,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:54,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '462#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_16| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_16| |#valid|))) (exists ((|v_ULTIMATE.start_main_#t~malloc10#1.base_22| Int) (|v_ULTIMATE.start_main_#t~malloc11#1.base_22| Int) (|v_#valid_53| (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc12#1.base_22| Int)) (and (<= 2 |v_ULTIMATE.start_main_#t~malloc11#1.base_22|) (= (store (store (store |v_#valid_53| |v_ULTIMATE.start_main_#t~malloc10#1.base_22| 0) |v_ULTIMATE.start_main_#t~malloc11#1.base_22| 0) |v_ULTIMATE.start_main_#t~malloc12#1.base_22| 0) |#valid|) (<= 2 |v_ULTIMATE.start_main_#t~malloc12#1.base_22|) (<= 2 |v_ULTIMATE.start_main_#t~malloc10#1.base_22|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 05:18:54,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:54,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-11-14 05:18:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844597631] [2024-11-14 05:18:54,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:54,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:18:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:18:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:18:54,937 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 05:18:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:55,072 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-11-14 05:18:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:18:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:18:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:55,076 INFO L225 Difference]: With dead ends: 42 [2024-11-14 05:18:55,076 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 05:18:55,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:18:55,077 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:55,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 05:18:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2024-11-14 05:18:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 27 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 05:18:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-14 05:18:55,086 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2024-11-14 05:18:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:55,086 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-14 05:18:55,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 05:18:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-14 05:18:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:18:55,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:55,087 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:55,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:55,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 05:18:55,288 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:55,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1481027091, now seen corresponding path program 1 times [2024-11-14 05:18:55,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:55,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108115790] [2024-11-14 05:18:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:55,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:55,355 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 05:18:55,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:55,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108115790] [2024-11-14 05:18:55,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108115790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:55,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:55,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:18:55,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009735688] [2024-11-14 05:18:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:55,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:18:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:18:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:18:55,361 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:55,428 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-14 05:18:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:18:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 05:18:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:55,429 INFO L225 Difference]: With dead ends: 26 [2024-11-14 05:18:55,429 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 05:18:55,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:18:55,430 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:55,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 05:18:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 05:18:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-14 05:18:55,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2024-11-14 05:18:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:55,434 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-14 05:18:55,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-14 05:18:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:18:55,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:55,434 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:55,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:18:55,435 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:55,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1481027092, now seen corresponding path program 1 times [2024-11-14 05:18:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:55,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916327385] [2024-11-14 05:18:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:55,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916327385] [2024-11-14 05:18:55,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916327385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:18:55,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:18:55,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:18:55,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420525855] [2024-11-14 05:18:55,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:18:55,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:18:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:18:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:18:55,513 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:55,573 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-14 05:18:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:18:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 05:18:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:55,574 INFO L225 Difference]: With dead ends: 36 [2024-11-14 05:18:55,575 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 05:18:55,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:18:55,575 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:55,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 58 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 05:18:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-11-14 05:18:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.72) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-14 05:18:55,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 8 [2024-11-14 05:18:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:55,582 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-14 05:18:55,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-14 05:18:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:18:55,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:55,582 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:55,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:18:55,586 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:55,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1478895787, now seen corresponding path program 1 times [2024-11-14 05:18:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657171940] [2024-11-14 05:18:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:55,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657171940] [2024-11-14 05:18:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657171940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802626517] [2024-11-14 05:18:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:55,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:55,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:55,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:18:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:55,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:18:55,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:56,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-11-14 05:18:56,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 05:18:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:18:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:18:56,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-14 05:18:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:56,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802626517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79609423] [2024-11-14 05:18:56,493 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:18:56,493 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:56,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:56,494 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:56,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:57,365 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:57,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '725#(and (exists ((|v_ULTIMATE.start_main_~B~0#1.offset_26| Int) (|v_ULTIMATE.start_main_~B~0#1.base_27| Int) (|v_ULTIMATE.start_main_~i~2#1_39| Int)) (and (<= (select |#length| |v_ULTIMATE.start_main_~B~0#1.base_27|) (+ (* |v_ULTIMATE.start_main_~i~2#1_39| 4) 3)) (<= 2 |v_ULTIMATE.start_main_~B~0#1.base_27|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~D~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~D~0#1.base|) (= |v_ULTIMATE.start_main_~B~0#1.offset_26| 0) (= |ULTIMATE.start_main_~A~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_39|) (<= 2 |ULTIMATE.start_main_~A~0#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_39| 1) |ULTIMATE.start_main_~Blen~0#1|))) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet15#1|)) (<= |ULTIMATE.start_main_#t~nondet15#1| 2147483647))' at error location [2024-11-14 05:18:57,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:57,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:57,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 05:18:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954349530] [2024-11-14 05:18:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:57,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:18:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:18:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:18:57,846 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 05:18:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:58,105 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 05:18:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:18:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) Word has length 8 [2024-11-14 05:18:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:58,106 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:18:58,106 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:18:58,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:18:58,107 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:58,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 84 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:18:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:18:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-14 05:18:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 23 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 05:18:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 05:18:58,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 8 [2024-11-14 05:18:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:58,110 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 05:18:58,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 05:18:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 05:18:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:18:58,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:58,111 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:58,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:18:58,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:18:58,312 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:58,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -413134414, now seen corresponding path program 1 times [2024-11-14 05:18:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639589856] [2024-11-14 05:18:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:58,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:58,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639589856] [2024-11-14 05:18:58,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639589856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:58,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252717362] [2024-11-14 05:18:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:58,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:58,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:58,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:18:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:58,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:18:58,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:58,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:58,681 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 18 [2024-11-14 05:18:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:18:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252717362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:58,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076909314] [2024-11-14 05:18:58,693 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 05:18:58,693 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:58,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:58,694 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:58,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:59,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:59,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '850#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (= |ULTIMATE.start_diff_~D#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_45| Int) (|v_ULTIMATE.start_diff_~A#1.base_18| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_main_~i~2#1_45|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |v_ULTIMATE.start_diff_~A#1.base_18|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= (select |#length| |v_ULTIMATE.start_diff_~A#1.base_18|) 3) (<= 2 |ULTIMATE.start_diff_~D#1.base|))) (= |ULTIMATE.start_diff_~j~0#1| 0))' at error location [2024-11-14 05:18:59,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:59,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:59,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-14 05:18:59,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022548595] [2024-11-14 05:18:59,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:59,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:18:59,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:18:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:18:59,998 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 05:19:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:00,160 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2024-11-14 05:19:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:19:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) Word has length 10 [2024-11-14 05:19:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:00,161 INFO L225 Difference]: With dead ends: 41 [2024-11-14 05:19:00,161 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 05:19:00,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:19:00,162 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:00,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 05:19:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2024-11-14 05:19:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.619047619047619) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-14 05:19:00,167 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 10 [2024-11-14 05:19:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:00,167 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-14 05:19:00,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 05:19:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-14 05:19:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:19:00,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:00,168 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:00,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:00,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:19:00,369 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:00,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash 77735060, now seen corresponding path program 1 times [2024-11-14 05:19:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:00,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601760226] [2024-11-14 05:19:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:00,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601760226] [2024-11-14 05:19:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601760226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:19:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:19:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:19:00,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753941947] [2024-11-14 05:19:00,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:19:00,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:19:00,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:19:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:19:00,435 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:00,475 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-11-14 05:19:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:19:00,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 05:19:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:00,476 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:19:00,476 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 05:19:00,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:19:00,477 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:00,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:19:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 05:19:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 05:19:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 26 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 05:19:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-14 05:19:00,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2024-11-14 05:19:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:00,481 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-14 05:19:00,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-14 05:19:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:19:00,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:00,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:00,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 05:19:00,482 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:00,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 77735061, now seen corresponding path program 1 times [2024-11-14 05:19:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:00,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270643994] [2024-11-14 05:19:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:00,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:00,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:00,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270643994] [2024-11-14 05:19:00,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270643994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023180993] [2024-11-14 05:19:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:00,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:00,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:00,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:19:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:00,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 05:19:00,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:00,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:00,848 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 18 [2024-11-14 05:19:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023180993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556110705] [2024-11-14 05:19:00,869 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 05:19:00,871 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:00,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:00,871 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:00,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:01,651 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:02,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_51| Int) (|v_ULTIMATE.start_diff_~B#1.base_18| Int)) (and (<= 2 |v_ULTIMATE.start_diff_~B#1.base_18|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_main_~i~2#1_51|) (<= (select |#length| |v_ULTIMATE.start_diff_~B#1.base_18|) 3) (<= 2 |ULTIMATE.start_diff_~D#1.base|))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 4 (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~D#1.offset| 0) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) |ULTIMATE.start_diff_#t~mem2#1|))' at error location [2024-11-14 05:19:02,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:02,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:02,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-14 05:19:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128399853] [2024-11-14 05:19:02,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:02,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:19:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:19:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:19:02,313 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 05:19:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:02,438 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-14 05:19:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:19:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 05:19:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:02,439 INFO L225 Difference]: With dead ends: 31 [2024-11-14 05:19:02,439 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 05:19:02,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:19:02,440 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:02,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 33 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 05:19:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-14 05:19:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-14 05:19:02,442 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 11 [2024-11-14 05:19:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:02,443 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-14 05:19:02,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 05:19:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-14 05:19:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 05:19:02,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:02,443 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:02,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:19:02,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:19:02,647 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:02,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1883822984, now seen corresponding path program 1 times [2024-11-14 05:19:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:02,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37929954] [2024-11-14 05:19:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:02,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:02,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37929954] [2024-11-14 05:19:02,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37929954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:02,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959835039] [2024-11-14 05:19:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:02,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:02,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:02,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:02,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:19:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:02,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:19:02,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:02,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959835039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:02,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123833878] [2024-11-14 05:19:02,923 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 05:19:02,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:02,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:02,923 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:02,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:03,646 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:04,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1212#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= |ULTIMATE.start_diff_~l2~0#1| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 4 (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~D#1.offset| 0) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) |ULTIMATE.start_diff_#t~mem5#1|) (exists ((|v_ULTIMATE.start_diff_~D#1.base_19| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_diff_~D#1.base_19|) 1)) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_19|))))' at error location [2024-11-14 05:19:04,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:04,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-11-14 05:19:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899100130] [2024-11-14 05:19:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:04,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:19:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:19:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:19:04,225 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:04,311 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-14 05:19:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:19:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 05:19:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:04,313 INFO L225 Difference]: With dead ends: 28 [2024-11-14 05:19:04,313 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 05:19:04,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:19:04,314 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:04,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 68 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 05:19:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-14 05:19:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) 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 05:19:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 05:19:04,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2024-11-14 05:19:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:04,319 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 05:19:04,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 05:19:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:19:04,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:04,323 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:04,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:19:04,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:04,524 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:04,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash 819113734, now seen corresponding path program 1 times [2024-11-14 05:19:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347045073] [2024-11-14 05:19:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:04,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347045073] [2024-11-14 05:19:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347045073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036071347] [2024-11-14 05:19:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:04,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:04,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:04,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:19:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:04,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:19:04,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:04,835 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 43 treesize of output 27 [2024-11-14 05:19:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:04,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:04,962 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 30 treesize of output 26 [2024-11-14 05:19:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036071347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699410682] [2024-11-14 05:19:05,017 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 05:19:05,018 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:05,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:05,018 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:05,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:06,038 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:06,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1376#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (exists ((|v_ULTIMATE.start_diff_~B#1.base_21| Int) (|v_ULTIMATE.start_diff_~j~0#1_37| Int) (|v_ULTIMATE.start_diff_~B#1.offset_20| Int)) (and (<= 0 |v_ULTIMATE.start_diff_~j~0#1_37|) (or (< (select |#length| |v_ULTIMATE.start_diff_~B#1.base_21|) (+ |v_ULTIMATE.start_diff_~B#1.offset_20| (* |v_ULTIMATE.start_diff_~j~0#1_37| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~B#1.offset_20| (* |v_ULTIMATE.start_diff_~j~0#1_37| 4)) 0)))) (<= (+ |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 0 |ULTIMATE.start_diff_~A#1.offset|) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|)))' at error location [2024-11-14 05:19:06,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:06,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:06,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-14 05:19:06,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342963052] [2024-11-14 05:19:06,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:06,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:19:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:19:06,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:19:06,852 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:07,000 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2024-11-14 05:19:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:19:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 05:19:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:07,001 INFO L225 Difference]: With dead ends: 45 [2024-11-14 05:19:07,002 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 05:19:07,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:19:07,002 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:07,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 05:19:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-14 05:19:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 40 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 05:19:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-11-14 05:19:07,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 14 [2024-11-14 05:19:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:07,008 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-11-14 05:19:07,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-11-14 05:19:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:19:07,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:07,010 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:07,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:19:07,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:07,214 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:07,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -375920601, now seen corresponding path program 1 times [2024-11-14 05:19:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:07,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251721676] [2024-11-14 05:19:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:07,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251721676] [2024-11-14 05:19:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251721676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:19:07,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:19:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:19:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392515021] [2024-11-14 05:19:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:19:07,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:19:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:19:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:19:07,350 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 05:19:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:07,382 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-11-14 05:19:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:19:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2024-11-14 05:19:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:07,384 INFO L225 Difference]: With dead ends: 40 [2024-11-14 05:19:07,384 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 05:19:07,384 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 05:19:07,385 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:07,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:19:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 05:19:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-14 05:19:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 39 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 05:19:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-11-14 05:19:07,392 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 15 [2024-11-14 05:19:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:07,392 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-11-14 05:19:07,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 05:19:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-11-14 05:19:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:19:07,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:07,393 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:07,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 05:19:07,393 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:07,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -375920600, now seen corresponding path program 1 times [2024-11-14 05:19:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:07,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940687082] [2024-11-14 05:19:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:07,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940687082] [2024-11-14 05:19:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940687082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292980424] [2024-11-14 05:19:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:07,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:07,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:19:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:07,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:19:07,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:07,797 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:19:07,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-14 05:19:07,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 05:19:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:07,846 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:19:07,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-14 05:19:07,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:07,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 05:19:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:08,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292980424] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:08,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:19:08,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2024-11-14 05:19:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513137880] [2024-11-14 05:19:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:19:08,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:19:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:19:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:19:08,399 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 05:19:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:08,469 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-11-14 05:19:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:19:08,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 15 [2024-11-14 05:19:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:08,471 INFO L225 Difference]: With dead ends: 62 [2024-11-14 05:19:08,473 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 05:19:08,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:19:08,474 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:08,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 05:19:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-11-14 05:19:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.375) internal successors, (77), 59 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-11-14 05:19:08,480 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 15 [2024-11-14 05:19:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:08,481 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-11-14 05:19:08,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 05:19:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-11-14 05:19:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:19:08,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:08,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:08,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:08,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:19:08,686 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:08,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1231642014, now seen corresponding path program 1 times [2024-11-14 05:19:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:08,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076497724] [2024-11-14 05:19:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:09,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076497724] [2024-11-14 05:19:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076497724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680516464] [2024-11-14 05:19:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:09,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:09,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:09,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:19:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:09,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:19:09,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:10,111 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:19:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680516464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:19:10,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:19:10,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-14 05:19:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671753098] [2024-11-14 05:19:10,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:19:10,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:19:10,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:19:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:19:10,112 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:10,353 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-11-14 05:19:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:19:10,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 05:19:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:10,355 INFO L225 Difference]: With dead ends: 59 [2024-11-14 05:19:10,355 INFO L226 Difference]: Without dead ends: 58 [2024-11-14 05:19:10,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:19:10,355 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:10,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:19:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-14 05:19:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-14 05:19:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.309090909090909) internal successors, (72), 57 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 05:19:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-11-14 05:19:10,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 16 [2024-11-14 05:19:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:10,359 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-11-14 05:19:10,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-11-14 05:19:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:19:10,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:10,360 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:10,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:10,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:19:10,561 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:10,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash -131177436, now seen corresponding path program 2 times [2024-11-14 05:19:10,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:10,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209551070] [2024-11-14 05:19:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:19:10,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209551070] [2024-11-14 05:19:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209551070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899535631] [2024-11-14 05:19:10,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:10,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:10,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:10,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:10,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:19:10,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:19:10,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:10,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:19:10,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:11,072 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 43 treesize of output 27 [2024-11-14 05:19:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:11,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:11,409 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 05:19:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899535631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038834029] [2024-11-14 05:19:11,438 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 05:19:11,438 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:11,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:11,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:11,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:12,303 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:13,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2059#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 4 (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= |ULTIMATE.start_diff_~D#1.offset| 0) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) |ULTIMATE.start_diff_#t~mem2#1|))' at error location [2024-11-14 05:19:13,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:13,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:13,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-14 05:19:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901007880] [2024-11-14 05:19:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:13,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 05:19:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 05:19:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:19:13,019 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:13,419 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-11-14 05:19:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:19:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 05:19:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:13,420 INFO L225 Difference]: With dead ends: 62 [2024-11-14 05:19:13,420 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 05:19:13,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:19:13,421 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:13,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:19:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 05:19:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2024-11-14 05:19:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 53 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 05:19:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-14 05:19:13,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 16 [2024-11-14 05:19:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:13,425 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-14 05:19:13,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-14 05:19:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:19:13,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:13,426 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:13,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:19:13,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:13,630 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:13,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash -473862870, now seen corresponding path program 1 times [2024-11-14 05:19:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:13,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305417741] [2024-11-14 05:19:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:13,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305417741] [2024-11-14 05:19:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305417741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356717056] [2024-11-14 05:19:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:13,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:13,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:19:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:13,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:19:13,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:13,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356717056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603417235] [2024-11-14 05:19:13,956 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:19:13,957 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:13,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:13,957 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:13,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:15,436 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:16,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2305#(and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 0 |ULTIMATE.start_diff_~j~0#1|) (exists ((|v_ULTIMATE.start_diff_~A#1.base_25| Int) (|v_ULTIMATE.start_diff_~A#1.offset_23| Int) (|v_ULTIMATE.start_diff_~i~0#1_34| Int)) (and (<= 0 |v_ULTIMATE.start_diff_~i~0#1_34|) (or (< (select |#length| |v_ULTIMATE.start_diff_~A#1.base_25|) (+ (* |v_ULTIMATE.start_diff_~i~0#1_34| 4) |v_ULTIMATE.start_diff_~A#1.offset_23| 4)) (< (+ (* |v_ULTIMATE.start_diff_~i~0#1_34| 4) |v_ULTIMATE.start_diff_~A#1.offset_23|) 0)))))' at error location [2024-11-14 05:19:16,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:16,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:16,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-14 05:19:16,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452393113] [2024-11-14 05:19:16,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:16,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:19:16,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:19:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:19:16,262 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:16,333 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2024-11-14 05:19:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:19:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 05:19:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:16,334 INFO L225 Difference]: With dead ends: 86 [2024-11-14 05:19:16,334 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 05:19:16,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:19:16,335 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:16,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 05:19:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-14 05:19:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 55 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 05:19:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-14 05:19:16,339 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 17 [2024-11-14 05:19:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:16,339 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-14 05:19:16,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-14 05:19:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:19:16,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:16,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:16,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:19:16,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:16,544 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:16,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash -522846500, now seen corresponding path program 2 times [2024-11-14 05:19:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446974229] [2024-11-14 05:19:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:16,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446974229] [2024-11-14 05:19:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446974229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229411858] [2024-11-14 05:19:16,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:16,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:16,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:16,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:16,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:19:16,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:19:16,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:16,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:19:16,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:16,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:17,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 05:19:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:17,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229411858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506369291] [2024-11-14 05:19:17,380 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 05:19:17,381 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:17,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:17,381 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:17,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:18,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:18,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2585#(and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~k~0#1| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~found~0#1| 0) (<= 0 |ULTIMATE.start_diff_~j~0#1|) (= |ULTIMATE.start_diff_~D#1.offset| 0))' at error location [2024-11-14 05:19:18,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:18,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:18,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-14 05:19:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344161477] [2024-11-14 05:19:18,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:18,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:19:18,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:19:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:19:18,926 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:19,218 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2024-11-14 05:19:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:19:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 05:19:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:19,220 INFO L225 Difference]: With dead ends: 109 [2024-11-14 05:19:19,220 INFO L226 Difference]: Without dead ends: 109 [2024-11-14 05:19:19,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:19:19,221 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:19,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 52 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:19:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-14 05:19:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 48. [2024-11-14 05:19:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 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 05:19:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-11-14 05:19:19,225 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 19 [2024-11-14 05:19:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:19,225 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-11-14 05:19:19,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-11-14 05:19:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:19:19,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:19,226 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:19,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 05:19:19,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:19,445 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:19,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1633256751, now seen corresponding path program 1 times [2024-11-14 05:19:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:19,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327063761] [2024-11-14 05:19:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:19,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:19,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327063761] [2024-11-14 05:19:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327063761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:19,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036252818] [2024-11-14 05:19:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:19,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:19,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:19:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:20,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:19:20,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:20,144 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:19:20,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-14 05:19:20,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 05:19:20,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 05:19:20,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-14 05:19:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:20,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036252818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:20,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671620753] [2024-11-14 05:19:20,987 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:20,987 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:20,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:20,987 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:20,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:24,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:26,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2933#(exists ((|v_ULTIMATE.start_diff_~k~0#1_34| Int) (|v_ULTIMATE.start_diff_~D#1.offset_24| Int) (|v_ULTIMATE.start_diff_~D#1.base_26| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_128| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_128|) (or (and (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_128| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_128| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_128| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_128| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)))))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_109| Int)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_109|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_34| 0) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_109| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_109| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_109| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_94| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_diff_~D#1.offset_24| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_26|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_94|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0))) (= |v_ULTIMATE.start_diff_~j~0#1_109| 0))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_24| (* |v_ULTIMATE.start_diff_~k~0#1_34| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_26|) (+ |v_ULTIMATE.start_diff_~D#1.offset_24| 4 (* |v_ULTIMATE.start_diff_~k~0#1_34| 4))))))' at error location [2024-11-14 05:19:26,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:26,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:26,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-14 05:19:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125201465] [2024-11-14 05:19:26,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:26,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:19:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:19:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:19:26,497 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:26,709 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-14 05:19:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:19:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 05:19:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:26,710 INFO L225 Difference]: With dead ends: 67 [2024-11-14 05:19:26,710 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 05:19:26,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:19:26,712 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:26,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:19:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 05:19:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-14 05:19:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-11-14 05:19:26,718 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 26 [2024-11-14 05:19:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:26,718 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-11-14 05:19:26,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.588235294117647) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-11-14 05:19:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:19:26,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:26,723 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:26,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:19:26,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:19:26,923 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:26,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash 921719866, now seen corresponding path program 2 times [2024-11-14 05:19:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:26,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642368721] [2024-11-14 05:19:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:26,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:27,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642368721] [2024-11-14 05:19:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642368721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103828919] [2024-11-14 05:19:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:27,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:27,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:19:27,221 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:19:27,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:27,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:19:27,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:27,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:19:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103828919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [820866115] [2024-11-14 05:19:27,424 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:27,424 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:27,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:27,424 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:27,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:30,783 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:32,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3296#(exists ((|v_ULTIMATE.start_diff_~k~0#1_42| Int) (|v_ULTIMATE.start_diff_~D#1.offset_26| Int) (|v_ULTIMATE.start_diff_~D#1.base_28| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_26| (* |v_ULTIMATE.start_diff_~k~0#1_42| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_28|) (+ |v_ULTIMATE.start_diff_~D#1.offset_26| 4 (* |v_ULTIMATE.start_diff_~k~0#1_42| 4)))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_142| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_142|) (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_142| 0) (= |v_ULTIMATE.start_diff_~k~0#1_42| 0) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_42| 0) (= |ULTIMATE.start_diff_~i~0#1| 0))) (or (and (exists ((|v_ULTIMATE.start_main_~i~2#1_100| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_diff_~D#1.offset_26| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_100|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_28|))) (= |v_ULTIMATE.start_diff_~j~0#1_142| 0)) (and (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_142| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_142|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_142| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_142| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|))))))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_161| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_161| 4))))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_161| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_161| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_161| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_161|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:19:32,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:32,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:32,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-14 05:19:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846828419] [2024-11-14 05:19:32,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:32,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:19:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:32,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:19:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:19:32,556 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:32,659 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2024-11-14 05:19:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:19:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 05:19:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:32,660 INFO L225 Difference]: With dead ends: 138 [2024-11-14 05:19:32,660 INFO L226 Difference]: Without dead ends: 69 [2024-11-14 05:19:32,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:19:32,660 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:32,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-14 05:19:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-11-14 05:19:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2024-11-14 05:19:32,664 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 35 [2024-11-14 05:19:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:32,664 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2024-11-14 05:19:32,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2024-11-14 05:19:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:19:32,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:32,665 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:32,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:32,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 05:19:32,865 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:32,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash 416980332, now seen corresponding path program 3 times [2024-11-14 05:19:32,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:32,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513391374] [2024-11-14 05:19:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:32,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:19:33,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513391374] [2024-11-14 05:19:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513391374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366859167] [2024-11-14 05:19:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:33,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:33,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:33,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:19:33,515 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:33,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:33,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 05:19:33,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:33,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-14 05:19:33,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:33,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:33,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:19:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:19:33,588 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:19:34,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:19:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366859167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331066188] [2024-11-14 05:19:35,221 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:35,221 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:35,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:35,222 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:35,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:38,790 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:41,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3752#(exists ((|v_ULTIMATE.start_diff_~D#1.offset_28| Int) (|v_ULTIMATE.start_diff_~D#1.base_30| Int) (|v_ULTIMATE.start_diff_~k~0#1_52| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_194| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_194|) (or (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_194| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_194| 4) (- 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_194| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_194| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (exists ((|v_ULTIMATE.start_diff_~j~0#1_175| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_52| 0) (= |v_ULTIMATE.start_diff_~j~0#1_175| 0) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_52| 0) (= |ULTIMATE.start_diff_~i~0#1| 0))) (or (and (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_175| 4) |ULTIMATE.start_diff_~B#1.offset|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_175| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_175|) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_175| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_106| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_106|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_28| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_30|))) (= |v_ULTIMATE.start_diff_~j~0#1_175| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_175|))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_30|) (+ |v_ULTIMATE.start_diff_~D#1.offset_28| (* |v_ULTIMATE.start_diff_~k~0#1_52| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_28| (* |v_ULTIMATE.start_diff_~k~0#1_52| 4)) 0))))' at error location [2024-11-14 05:19:41,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:41,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:41,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-14 05:19:41,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358867621] [2024-11-14 05:19:41,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:41,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 05:19:41,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 05:19:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 05:19:41,019 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 24 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 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 05:19:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:42,254 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2024-11-14 05:19:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:19:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-14 05:19:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:42,256 INFO L225 Difference]: With dead ends: 149 [2024-11-14 05:19:42,256 INFO L226 Difference]: Without dead ends: 149 [2024-11-14 05:19:42,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:19:42,257 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:42,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:19:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-14 05:19:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 122. [2024-11-14 05:19:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 121 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2024-11-14 05:19:42,261 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 37 [2024-11-14 05:19:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:42,262 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2024-11-14 05:19:42,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 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 05:19:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2024-11-14 05:19:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 05:19:42,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:42,263 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:42,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:19:42,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:42,464 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:42,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -362297697, now seen corresponding path program 4 times [2024-11-14 05:19:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634561702] [2024-11-14 05:19:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 115 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:19:42,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634561702] [2024-11-14 05:19:42,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634561702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657873650] [2024-11-14 05:19:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:19:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:42,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:42,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:19:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:42,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:19:42,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 131 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:19:43,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 131 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:19:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657873650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057447327] [2024-11-14 05:19:43,183 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:43,183 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:43,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:43,183 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:43,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:46,266 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:48,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4458#(exists ((|v_ULTIMATE.start_diff_~D#1.base_32| Int) (|v_ULTIMATE.start_diff_~k~0#1_63| Int) (|v_ULTIMATE.start_diff_~D#1.offset_30| Int)) (and (or (< (+ (* |v_ULTIMATE.start_diff_~k~0#1_63| 4) |v_ULTIMATE.start_diff_~D#1.offset_30|) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_32|) (+ (* |v_ULTIMATE.start_diff_~k~0#1_63| 4) |v_ULTIMATE.start_diff_~D#1.offset_30| 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_237| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_237|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_237| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_237| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_237| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_237| 4) (- 4))))))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_217| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_217|) (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_63| 0) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_63| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~j~0#1_217| 0))) (or (and (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_217| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_217| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_217|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_217| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_217| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_112| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_112|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_32|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_30| 0))))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:19:48,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:48,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:48,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2024-11-14 05:19:48,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171940583] [2024-11-14 05:19:48,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:48,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:19:48,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:19:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:19:48,306 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 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 05:19:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:48,458 INFO L93 Difference]: Finished difference Result 252 states and 287 transitions. [2024-11-14 05:19:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:19:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 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 64 [2024-11-14 05:19:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:48,459 INFO L225 Difference]: With dead ends: 252 [2024-11-14 05:19:48,459 INFO L226 Difference]: Without dead ends: 125 [2024-11-14 05:19:48,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:19:48,460 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:48,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:19:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-14 05:19:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2024-11-14 05:19:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2024-11-14 05:19:48,464 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 64 [2024-11-14 05:19:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:48,464 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2024-11-14 05:19:48,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 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 05:19:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2024-11-14 05:19:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 05:19:48,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:48,466 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:48,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:19:48,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:48,666 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:48,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -412638547, now seen corresponding path program 5 times [2024-11-14 05:19:48,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:48,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510394548] [2024-11-14 05:19:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:48,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 115 proven. 61 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:19:48,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:48,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510394548] [2024-11-14 05:19:48,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510394548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:48,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188550830] [2024-11-14 05:19:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:48,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:48,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:19:49,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:19:49,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:49,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:19:49,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 87 proven. 80 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:19:49,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 87 proven. 80 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:19:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188550830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829577101] [2024-11-14 05:19:49,896 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:49,896 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:49,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:49,896 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:49,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:53,047 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:55,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5268#(exists ((|v_ULTIMATE.start_diff_~D#1.base_34| Int) (|v_ULTIMATE.start_diff_~k~0#1_74| Int) (|v_ULTIMATE.start_diff_~D#1.offset_32| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_260| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_260|) (or (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_260|) (<= (* |v_ULTIMATE.start_diff_~j~0#1_260| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_260| 4)))))) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_118| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_118|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_34|))) (= |v_ULTIMATE.start_diff_~j~0#1_260| 0))) (or (and (= |v_ULTIMATE.start_diff_~D#1.offset_32| 0) (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~k~0#1_74| 0)) (and (= |v_ULTIMATE.start_diff_~D#1.offset_32| 0) (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_260| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~k~0#1_74| 0))))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (exists ((|v_ULTIMATE.start_diff_~j~0#1_280| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_280|) (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_280| 4) |ULTIMATE.start_diff_~B#1.offset|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_280| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_280| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_280| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_34|) (+ |v_ULTIMATE.start_diff_~D#1.offset_32| (* |v_ULTIMATE.start_diff_~k~0#1_74| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_32| (* |v_ULTIMATE.start_diff_~k~0#1_74| 4)) 0))))' at error location [2024-11-14 05:19:55,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:55,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-11-14 05:19:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770330830] [2024-11-14 05:19:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:55,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 05:19:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 05:19:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 05:19:55,362 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:55,746 INFO L93 Difference]: Finished difference Result 330 states and 375 transitions. [2024-11-14 05:19:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:19:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-14 05:19:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:55,747 INFO L225 Difference]: With dead ends: 330 [2024-11-14 05:19:55,747 INFO L226 Difference]: Without dead ends: 127 [2024-11-14 05:19:55,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 158 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=267, Invalid=2183, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:19:55,748 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:55,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 184 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:19:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-14 05:19:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-11-14 05:19:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.184) internal successors, (148), 125 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 05:19:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2024-11-14 05:19:55,752 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 66 [2024-11-14 05:19:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:55,752 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2024-11-14 05:19:55,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2024-11-14 05:19:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 05:19:55,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:55,753 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:55,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:19:55,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 05:19:55,953 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:55,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1545555141, now seen corresponding path program 6 times [2024-11-14 05:19:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905994872] [2024-11-14 05:19:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:55,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 115 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:19:56,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905994872] [2024-11-14 05:19:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905994872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022444654] [2024-11-14 05:19:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:56,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:56,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:19:56,563 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:56,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:56,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:19:56,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 160 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:19:56,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 160 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:19:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022444654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:56,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085222978] [2024-11-14 05:19:56,996 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:19:56,997 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:56,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:56,997 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:56,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:00,067 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:02,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6171#(exists ((|v_ULTIMATE.start_diff_~k~0#1_85| Int) (|v_ULTIMATE.start_diff_~D#1.offset_34| Int) (|v_ULTIMATE.start_diff_~D#1.base_36| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_323| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_323| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_323| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_323| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_323| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_323|))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_303| Int)) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~2#1_124| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_124|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (= |v_ULTIMATE.start_diff_~D#1.offset_34| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_36|))) (= |v_ULTIMATE.start_diff_~j~0#1_303| 0)) (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_303| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_303| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_303|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_303| 4))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_303|) (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_85| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_85| 0) (= |v_ULTIMATE.start_diff_~j~0#1_303| 0) (= |ULTIMATE.start_diff_~i~0#1| 0))))))) (or (< (+ (* |v_ULTIMATE.start_diff_~k~0#1_85| 4) |v_ULTIMATE.start_diff_~D#1.offset_34|) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_36|) (+ (* |v_ULTIMATE.start_diff_~k~0#1_85| 4) |v_ULTIMATE.start_diff_~D#1.offset_34| 4)))))' at error location [2024-11-14 05:20:02,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:02,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:02,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2024-11-14 05:20:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867857792] [2024-11-14 05:20:02,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:02,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 05:20:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 05:20:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:20:02,460 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:02,664 INFO L93 Difference]: Finished difference Result 426 states and 484 transitions. [2024-11-14 05:20:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:20:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-14 05:20:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:02,667 INFO L225 Difference]: With dead ends: 426 [2024-11-14 05:20:02,667 INFO L226 Difference]: Without dead ends: 129 [2024-11-14 05:20:02,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 17 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:20:02,668 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:02,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 120 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:20:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-14 05:20:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2024-11-14 05:20:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 127 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-11-14 05:20:02,674 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 68 [2024-11-14 05:20:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:02,674 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-11-14 05:20:02,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-11-14 05:20:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 05:20:02,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:02,675 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:02,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:20:02,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:20:02,877 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:02,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 643291209, now seen corresponding path program 7 times [2024-11-14 05:20:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562731839] [2024-11-14 05:20:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:02,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 20 proven. 177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:20:04,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:04,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562731839] [2024-11-14 05:20:04,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562731839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:04,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209394263] [2024-11-14 05:20:04,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:20:04,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:04,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:04,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:04,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:20:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:04,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:20:04,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:04,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 05:20:04,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-14 05:20:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:20:04,298 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:20:04,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-14 05:20:04,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 05:20:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:20:06,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 1 proven. 160 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:20:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209394263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334401219] [2024-11-14 05:20:08,264 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:20:08,264 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:08,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:08,264 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:08,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:11,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:14,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7191#(exists ((|v_ULTIMATE.start_diff_~k~0#1_101| Int) (|v_ULTIMATE.start_diff_~D#1.offset_36| Int) (|v_ULTIMATE.start_diff_~D#1.base_38| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_36| (* |v_ULTIMATE.start_diff_~k~0#1_101| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_38|) (+ |v_ULTIMATE.start_diff_~D#1.offset_36| (* |v_ULTIMATE.start_diff_~k~0#1_101| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_346| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_346|) (= |v_ULTIMATE.start_diff_~k~0#1_101| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_36| 0) (or (and (exists ((|v_ULTIMATE.start_main_~i~2#1_130| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_38|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_130|))) (= |v_ULTIMATE.start_diff_~j~0#1_346| 0)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (* |v_ULTIMATE.start_diff_~j~0#1_346| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_346| 4) (- 4)))))))))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_365| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_365|) (or (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_365| 0)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_365| 4) (- 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_365| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_365| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)))))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:20:14,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:14,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:14,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2024-11-14 05:20:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029662182] [2024-11-14 05:20:14,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:14,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 05:20:14,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 05:20:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:20:14,364 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 42 states, 41 states have (on average 4.634146341463414) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:17,839 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2024-11-14 05:20:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 05:20:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.634146341463414) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-14 05:20:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:17,841 INFO L225 Difference]: With dead ends: 287 [2024-11-14 05:20:17,841 INFO L226 Difference]: Without dead ends: 287 [2024-11-14 05:20:17,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 167 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=887, Invalid=5919, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 05:20:17,843 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:17,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 431 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:20:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-14 05:20:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 236. [2024-11-14 05:20:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.174468085106383) internal successors, (276), 235 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2024-11-14 05:20:17,851 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 70 [2024-11-14 05:20:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:17,851 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2024-11-14 05:20:17,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.634146341463414) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2024-11-14 05:20:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 05:20:17,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:17,853 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:17,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 05:20:18,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:20:18,057 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:18,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1284978519, now seen corresponding path program 8 times [2024-11-14 05:20:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582366214] [2024-11-14 05:20:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:18,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 604 proven. 147 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:18,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582366214] [2024-11-14 05:20:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582366214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387436737] [2024-11-14 05:20:18,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:20:18,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:18,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:18,781 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:18,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:20:19,217 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 05:20:19,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:19,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:20:19,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 224 proven. 372 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-14 05:20:20,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 224 proven. 372 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-14 05:20:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387436737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152019428] [2024-11-14 05:20:20,607 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:20:20,607 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:20,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:20,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:20,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:23,729 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:27,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8572#(exists ((|v_ULTIMATE.start_diff_~D#1.offset_38| Int) (|v_ULTIMATE.start_diff_~k~0#1_118| Int) (|v_ULTIMATE.start_diff_~D#1.base_40| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_406| Int)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_118| 0) (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_406| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_406| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_406| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1)) (and (= |v_ULTIMATE.start_diff_~j~0#1_406| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_136| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_diff_~D#1.offset_38| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_40|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_136|))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_406|) (= |ULTIMATE.start_diff_~i~0#1| 0)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_425| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_425| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_425| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_425| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_425| 4))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_425|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_40|) (+ |v_ULTIMATE.start_diff_~D#1.offset_38| 4 (* |v_ULTIMATE.start_diff_~k~0#1_118| 4))) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_38| (* |v_ULTIMATE.start_diff_~k~0#1_118| 4)) 0))))' at error location [2024-11-14 05:20:27,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:27,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 47 [2024-11-14 05:20:27,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247020332] [2024-11-14 05:20:27,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:27,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:20:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:20:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2951, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:20:27,064 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand has 48 states, 48 states have (on average 4.770833333333333) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:27,769 INFO L93 Difference]: Finished difference Result 648 states and 740 transitions. [2024-11-14 05:20:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:20:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.770833333333333) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 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 124 [2024-11-14 05:20:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:27,770 INFO L225 Difference]: With dead ends: 648 [2024-11-14 05:20:27,770 INFO L226 Difference]: Without dead ends: 239 [2024-11-14 05:20:27,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 318 SyntacticMatches, 17 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:20:27,772 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:27,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 347 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:20:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-14 05:20:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2024-11-14 05:20:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.1729957805907174) internal successors, (278), 237 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 278 transitions. [2024-11-14 05:20:27,778 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 278 transitions. Word has length 124 [2024-11-14 05:20:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:27,778 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 278 transitions. [2024-11-14 05:20:27,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.770833333333333) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 278 transitions. [2024-11-14 05:20:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-14 05:20:27,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:27,780 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:27,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 05:20:27,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:20:27,984 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:27,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash -666539081, now seen corresponding path program 9 times [2024-11-14 05:20:27,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:27,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92940090] [2024-11-14 05:20:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:27,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 604 proven. 160 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:28,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92940090] [2024-11-14 05:20:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92940090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948732619] [2024-11-14 05:20:28,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:20:28,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:28,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:28,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:28,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:20:29,384 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:20:29,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:29,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:20:29,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 715 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:30,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 715 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948732619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941421881] [2024-11-14 05:20:30,456 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:20:30,456 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:30,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:30,457 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:30,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:33,538 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:36,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10280#(exists ((|v_ULTIMATE.start_diff_~k~0#1_135| Int) (|v_ULTIMATE.start_diff_~D#1.offset_40| Int) (|v_ULTIMATE.start_diff_~D#1.base_42| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_40| (* |v_ULTIMATE.start_diff_~k~0#1_135| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_42|) (+ |v_ULTIMATE.start_diff_~D#1.offset_40| (* |v_ULTIMATE.start_diff_~k~0#1_135| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_486| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_486|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_486| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_486| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_486| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_486| 4))))))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_466| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~D#1.offset_40| 0) (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_135| 0) (= |v_ULTIMATE.start_diff_~j~0#1_466| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0)) (and (= |v_ULTIMATE.start_diff_~D#1.offset_40| 0) (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_135| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0))) (or (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_466|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_466| 4) (- 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (* |v_ULTIMATE.start_diff_~j~0#1_466| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_466| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_142| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_42|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_142|))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_466|))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:20:36,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:36,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:36,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 45 [2024-11-14 05:20:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613431090] [2024-11-14 05:20:36,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:36,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:20:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:20:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:20:36,978 INFO L87 Difference]: Start difference. First operand 238 states and 278 transitions. Second operand has 46 states, 46 states have (on average 6.282608695652174) internal successors, (289), 45 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:37,519 INFO L93 Difference]: Finished difference Result 2027 states and 2318 transitions. [2024-11-14 05:20:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 05:20:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.282608695652174) internal successors, (289), 45 states have internal predecessors, (289), 0 states have call successors, (0), 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 126 [2024-11-14 05:20:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:37,521 INFO L225 Difference]: With dead ends: 2027 [2024-11-14 05:20:37,521 INFO L226 Difference]: Without dead ends: 249 [2024-11-14 05:20:37,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 322 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:20:37,523 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:37,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 311 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:20:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-14 05:20:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2024-11-14 05:20:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.165991902834008) internal successors, (288), 247 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2024-11-14 05:20:37,530 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 126 [2024-11-14 05:20:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:37,530 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2024-11-14 05:20:37,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.282608695652174) internal successors, (289), 45 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2024-11-14 05:20:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 05:20:37,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:37,532 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:37,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 05:20:37,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:37,736 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:37,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -792596867, now seen corresponding path program 10 times [2024-11-14 05:20:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:37,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265167997] [2024-11-14 05:20:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:37,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 110 proven. 750 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:20:39,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265167997] [2024-11-14 05:20:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265167997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793854998] [2024-11-14 05:20:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:20:39,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:39,901 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:39,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:20:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:40,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 05:20:40,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:40,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:20:40,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 05:20:40,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:20:40,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:20:40,209 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:40,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 05:20:40,219 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 132 proven. 727 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:43,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 144 proven. 715 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:20:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793854998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211052688] [2024-11-14 05:20:45,871 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:20:45,871 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:45,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:45,872 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:45,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:48,403 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:54,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13453#(exists ((|v_ULTIMATE.start_diff_~D#1.base_44| Int) (|v_ULTIMATE.start_diff_~D#1.offset_42| Int) (|v_ULTIMATE.start_diff_~k~0#1_163| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_42| (* |v_ULTIMATE.start_diff_~k~0#1_163| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_44|) (+ |v_ULTIMATE.start_diff_~D#1.offset_42| (* |v_ULTIMATE.start_diff_~k~0#1_163| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_527| Int)) (and (or (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~D#1.offset_42| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~k~0#1_163| 0)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_527| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_42| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~k~0#1_163| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_527|) (or (and (<= (* |v_ULTIMATE.start_diff_~j~0#1_527| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_527| 4) (- 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_527|)) (and (= |v_ULTIMATE.start_diff_~j~0#1_527| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_148| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_44|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_148|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|)))))))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_546| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_546|) (or (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_546| 4))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_546| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_546| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1)) (and (= |v_ULTIMATE.start_diff_~j~0#1_546| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:20:54,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:54,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:54,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 76 [2024-11-14 05:20:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858118550] [2024-11-14 05:20:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:54,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-14 05:20:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-14 05:20:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=6928, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 05:20:54,175 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 78 states, 77 states have (on average 5.298701298701299) internal successors, (408), 77 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:56,543 INFO L93 Difference]: Finished difference Result 267 states and 310 transitions. [2024-11-14 05:20:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:20:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 5.298701298701299) internal successors, (408), 77 states have internal predecessors, (408), 0 states have call successors, (0), 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 136 [2024-11-14 05:20:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:56,545 INFO L225 Difference]: With dead ends: 267 [2024-11-14 05:20:56,545 INFO L226 Difference]: Without dead ends: 267 [2024-11-14 05:20:56,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 335 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3595 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1099, Invalid=9203, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 05:20:56,548 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 57 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:56,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1483 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:20:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-14 05:20:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2024-11-14 05:20:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.1660377358490566) internal successors, (309), 265 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2024-11-14 05:20:56,554 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 136 [2024-11-14 05:20:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:56,555 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2024-11-14 05:20:56,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 5.298701298701299) internal successors, (408), 77 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2024-11-14 05:20:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:20:56,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:56,557 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:56,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 05:20:56,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:56,761 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:56,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1381909006, now seen corresponding path program 11 times [2024-11-14 05:20:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880130514] [2024-11-14 05:20:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 724 proven. 266 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:20:57,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:57,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880130514] [2024-11-14 05:20:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880130514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:57,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396231654] [2024-11-14 05:20:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:20:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:57,708 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:57,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:20:59,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 05:20:59,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:59,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:20:59,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 846 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:21:00,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 846 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:21:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396231654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081399218] [2024-11-14 05:21:00,555 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:21:00,555 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:00,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:00,555 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:00,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:03,510 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:07,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14932#(exists ((|v_ULTIMATE.start_diff_~D#1.base_46| Int) (|v_ULTIMATE.start_diff_~D#1.offset_44| Int) (|v_ULTIMATE.start_diff_~k~0#1_181| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_610| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_610| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_610| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))))) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_610| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_610| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_610|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_590| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_diff_~j~0#1_590|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_590| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_590| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_590| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_154| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_diff_~D#1.offset_44| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_154|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_46|))) (= |v_ULTIMATE.start_diff_~j~0#1_590| 0))) (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_181| 0) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_181| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~j~0#1_590| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_590|))))) (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_44| (* |v_ULTIMATE.start_diff_~k~0#1_181| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_46|) (+ |v_ULTIMATE.start_diff_~D#1.offset_44| (* |v_ULTIMATE.start_diff_~k~0#1_181| 4) 4)))))' at error location [2024-11-14 05:21:07,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:07,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:07,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2024-11-14 05:21:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160189420] [2024-11-14 05:21:07,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:07,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:21:07,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:21:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:21:07,394 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand has 44 states, 44 states have (on average 6.090909090909091) internal successors, (268), 43 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:08,023 INFO L93 Difference]: Finished difference Result 1728 states and 1982 transitions. [2024-11-14 05:21:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:21:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.090909090909091) internal successors, (268), 43 states have internal predecessors, (268), 0 states have call successors, (0), 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 145 [2024-11-14 05:21:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:08,026 INFO L225 Difference]: With dead ends: 1728 [2024-11-14 05:21:08,026 INFO L226 Difference]: Without dead ends: 269 [2024-11-14 05:21:08,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 371 SyntacticMatches, 38 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:21:08,027 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:08,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 424 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:21:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-14 05:21:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2024-11-14 05:21:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.1647940074906367) internal successors, (311), 267 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 311 transitions. [2024-11-14 05:21:08,040 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 311 transitions. Word has length 145 [2024-11-14 05:21:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:08,041 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 311 transitions. [2024-11-14 05:21:08,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.090909090909091) internal successors, (268), 43 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 311 transitions. [2024-11-14 05:21:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-14 05:21:08,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:08,044 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:08,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 05:21:08,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:08,245 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:21:08,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1876577344, now seen corresponding path program 12 times [2024-11-14 05:21:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140045660] [2024-11-14 05:21:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 132 proven. 884 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 05:21:10,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:10,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140045660] [2024-11-14 05:21:10,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140045660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:10,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54204858] [2024-11-14 05:21:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:21:10,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:10,466 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:10,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:21:11,247 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:21:11,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:21:11,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-14 05:21:11,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:11,266 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 42 treesize of output 38 [2024-11-14 05:21:11,292 INFO L349 Elim1Store]: treesize reduction 31, result has 26.2 percent of original size [2024-11-14 05:21:11,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-14 05:21:12,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 05:21:13,265 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-14 05:21:13,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 23 [2024-11-14 05:21:13,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 05:21:13,819 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:13,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:14,633 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:14,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:15,333 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:15,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:15,933 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:15,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:16,581 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:16,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:17,307 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:17,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:18,098 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:18,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:18,806 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:18,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:19,553 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:19,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:20,328 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-14 05:21:20,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2024-11-14 05:21:21,022 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 05:21:21,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 9 [2024-11-14 05:21:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 849 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-14 05:21:21,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:27,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:21:27,234 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 58 treesize of output 60 [2024-11-14 05:21:27,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 05:21:27,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:21:27,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2024-11-14 05:21:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 1 proven. 848 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-14 05:21:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54204858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:27,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720060041] [2024-11-14 05:21:27,829 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:21:27,829 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:27,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:27,830 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:27,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:30,898 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:40,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17912#(exists ((|v_ULTIMATE.start_diff_~k~0#1_211| Int) (|v_ULTIMATE.start_diff_~D#1.offset_46| Int) (|v_ULTIMATE.start_diff_~D#1.base_48| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_656| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~D#1.offset_46| 0) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_656|) (= |v_ULTIMATE.start_diff_~k~0#1_211| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (* |v_ULTIMATE.start_diff_~j~0#1_656| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_656| 4) (- 4)))))) (and (= |v_ULTIMATE.start_diff_~j~0#1_656| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_160| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_48|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_160|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|))))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (exists ((|v_ULTIMATE.start_diff_~j~0#1_675| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_675| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_675| 4))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_675| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_675| 4))))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_675|))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_48|) (+ |v_ULTIMATE.start_diff_~D#1.offset_46| (* |v_ULTIMATE.start_diff_~k~0#1_211| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_46| (* |v_ULTIMATE.start_diff_~k~0#1_211| 4)) 0))))' at error location [2024-11-14 05:21:40,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:40,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:40,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34, 34] total 96 [2024-11-14 05:21:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052849462] [2024-11-14 05:21:40,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:40,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-14 05:21:40,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-14 05:21:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=10429, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 05:21:40,307 INFO L87 Difference]: Start difference. First operand 268 states and 311 transitions. Second operand has 98 states, 97 states have (on average 4.051546391752577) internal successors, (393), 97 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:05,313 INFO L93 Difference]: Finished difference Result 864 states and 987 transitions. [2024-11-14 05:22:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-11-14 05:22:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 4.051546391752577) internal successors, (393), 97 states have internal predecessors, (393), 0 states have call successors, (0), 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 147 [2024-11-14 05:22:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:05,317 INFO L225 Difference]: With dead ends: 864 [2024-11-14 05:22:05,317 INFO L226 Difference]: Without dead ends: 864 [2024-11-14 05:22:05,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 349 SyntacticMatches, 13 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16363 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=7016, Invalid=43384, Unknown=0, NotChecked=0, Total=50400 [2024-11-14 05:22:05,323 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 505 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 6377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 6402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 6377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:05,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1727 Invalid, 6402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 6377 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-14 05:22:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2024-11-14 05:22:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 500. [2024-11-14 05:22:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.1663326653306614) internal successors, (582), 499 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 582 transitions. [2024-11-14 05:22:05,335 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 582 transitions. Word has length 147 [2024-11-14 05:22:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:05,335 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 582 transitions. [2024-11-14 05:22:05,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 4.051546391752577) internal successors, (393), 97 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 582 transitions. [2024-11-14 05:22:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-14 05:22:05,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:05,338 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:05,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:22:05,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:05,538 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:22:05,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1642091859, now seen corresponding path program 1 times [2024-11-14 05:22:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:05,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423254041] [2024-11-14 05:22:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 995 proven. 287 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:22:06,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423254041] [2024-11-14 05:22:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423254041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783878868] [2024-11-14 05:22:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:06,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:06,591 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:22:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:06,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 05:22:06,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 1104 proven. 169 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:22:07,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 1104 proven. 169 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:22:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783878868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [51218772] [2024-11-14 05:22:08,075 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:22:08,075 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:08,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:08,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:08,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:09,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:14,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20540#(exists ((|v_ULTIMATE.start_diff_~D#1.base_50| Int) (|v_ULTIMATE.start_diff_~k~0#1_229| Int) (|v_ULTIMATE.start_diff_~D#1.offset_48| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_740| Int)) (and (or (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_740| 4))) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_740| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_740| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_740| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_740|))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (exists ((|v_ULTIMATE.start_diff_~j~0#1_725| Int)) (and (or (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_725| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_725| 4))) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_725| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_725|)) (and (= |v_ULTIMATE.start_diff_~j~0#1_725| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_166| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (= |v_ULTIMATE.start_diff_~D#1.offset_48| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_50|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_166|))))) (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_229| 0)) (and (= |v_ULTIMATE.start_diff_~j~0#1_725| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_229| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_725|))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (+ (* |v_ULTIMATE.start_diff_~k~0#1_229| 4) |v_ULTIMATE.start_diff_~D#1.offset_48|) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_50|) (+ (* |v_ULTIMATE.start_diff_~k~0#1_229| 4) |v_ULTIMATE.start_diff_~D#1.offset_48| 4)))))' at error location [2024-11-14 05:22:14,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:14,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:14,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2024-11-14 05:22:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857727085] [2024-11-14 05:22:14,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:14,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:22:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:22:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=2781, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:22:14,112 INFO L87 Difference]: Start difference. First operand 500 states and 582 transitions. Second operand has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 47 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:14,763 INFO L93 Difference]: Finished difference Result 3410 states and 3915 transitions. [2024-11-14 05:22:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 05:22:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 47 states have internal predecessors, (295), 0 states have call successors, (0), 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 05:22:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:14,766 INFO L225 Difference]: With dead ends: 3410 [2024-11-14 05:22:14,766 INFO L226 Difference]: Without dead ends: 503 [2024-11-14 05:22:14,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 421 SyntacticMatches, 41 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=525, Invalid=2781, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:22:14,767 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:14,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 535 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:22:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-11-14 05:22:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2024-11-14 05:22:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.1656686626746506) internal successors, (584), 501 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 584 transitions. [2024-11-14 05:22:14,777 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 584 transitions. Word has length 163 [2024-11-14 05:22:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:14,777 INFO L471 AbstractCegarLoop]: Abstraction has 502 states and 584 transitions. [2024-11-14 05:22:14,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 47 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 584 transitions. [2024-11-14 05:22:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-14 05:22:14,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:14,780 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:14,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 05:22:14,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:14,981 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:22:14,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1853522299, now seen corresponding path program 2 times [2024-11-14 05:22:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645269363] [2024-11-14 05:22:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 995 proven. 314 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:22:15,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:15,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645269363] [2024-11-14 05:22:15,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645269363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:15,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476446721] [2024-11-14 05:22:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:22:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:15,906 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:15,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:22:17,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 05:22:17,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:22:17,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 05:22:17,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 1113 proven. 196 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:22:18,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 1113 proven. 196 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 05:22:19,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476446721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446049872] [2024-11-14 05:22:19,285 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:22:19,285 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:19,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:19,285 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:19,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:20,675 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:25,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25496#(exists ((|v_ULTIMATE.start_diff_~D#1.offset_50| Int) (|v_ULTIMATE.start_diff_~D#1.base_52| Int) (|v_ULTIMATE.start_diff_~k~0#1_247| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_790| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~j~0#1_790| 0) (= |v_ULTIMATE.start_diff_~k~0#1_247| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_247| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_790|) (or (and (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_790| 4) |ULTIMATE.start_diff_~B#1.offset| (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (<= 4 (+ (* |v_ULTIMATE.start_diff_~j~0#1_790| 4) |ULTIMATE.start_diff_~B#1.offset|)) (<= (+ (* |v_ULTIMATE.start_diff_~j~0#1_790| 4) |ULTIMATE.start_diff_~B#1.offset|) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_790|)) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_172| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_diff_~D#1.offset_50| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_52|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_172|))) (= |v_ULTIMATE.start_diff_~j~0#1_790| 0))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_804| Int)) (and (or (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_804| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_804| 4) (- 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_804| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_804| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_804|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_52|) (+ |v_ULTIMATE.start_diff_~D#1.offset_50| (* |v_ULTIMATE.start_diff_~k~0#1_247| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_50| (* |v_ULTIMATE.start_diff_~k~0#1_247| 4)) 0))))' at error location [2024-11-14 05:22:25,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:25,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2024-11-14 05:22:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074982311] [2024-11-14 05:22:25,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:25,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:22:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:22:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=2967, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 05:22:25,084 INFO L87 Difference]: Start difference. First operand 502 states and 584 transitions. Second operand has 50 states, 50 states have (on average 6.04) internal successors, (302), 49 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:25,749 INFO L93 Difference]: Finished difference Result 3848 states and 4423 transitions. [2024-11-14 05:22:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 05:22:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.04) internal successors, (302), 49 states have internal predecessors, (302), 0 states have call successors, (0), 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 05:22:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:25,751 INFO L225 Difference]: With dead ends: 3848 [2024-11-14 05:22:25,751 INFO L226 Difference]: Without dead ends: 505 [2024-11-14 05:22:25,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 424 SyntacticMatches, 43 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=573, Invalid=2967, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 05:22:25,752 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:25,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 528 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:22:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-14 05:22:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 504. [2024-11-14 05:22:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.1650099403578529) internal successors, (586), 503 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 586 transitions. [2024-11-14 05:22:25,761 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 586 transitions. Word has length 165 [2024-11-14 05:22:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:25,761 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 586 transitions. [2024-11-14 05:22:25,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.04) internal successors, (302), 49 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:22:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 586 transitions. [2024-11-14 05:22:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 05:22:25,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:25,764 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:25,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:22:25,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:25,964 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:22:25,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1820664631, now seen corresponding path program 3 times [2024-11-14 05:22:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:25,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575987755] [2024-11-14 05:22:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 185 proven. 1149 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 05:22:28,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575987755] [2024-11-14 05:22:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575987755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171210220] [2024-11-14 05:22:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:22:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:28,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:28,076 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:28,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:22:30,173 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:22:30,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:22:30,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 05:22:30,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:30,223 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 05:22:30,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:22:30,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:22:30,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-14 05:22:30,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:22:30,279 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 05:22:30,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2024-11-14 05:22:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 8 proven. 1106 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 05:22:35,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 9 proven. 1105 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-14 05:22:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171210220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928415286] [2024-11-14 05:22:39,800 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:22:39,801 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:39,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:39,801 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:39,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:41,057 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:50,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30947#(exists ((|v_ULTIMATE.start_diff_~k~0#1_278| Int) (|v_ULTIMATE.start_diff_~D#1.base_54| Int) (|v_ULTIMATE.start_diff_~D#1.offset_52| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_52| (* |v_ULTIMATE.start_diff_~k~0#1_278| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_54|) (+ |v_ULTIMATE.start_diff_~D#1.offset_52| (* |v_ULTIMATE.start_diff_~k~0#1_278| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_854| Int)) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~2#1_178| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_54|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_178|))) (= |v_ULTIMATE.start_diff_~j~0#1_854| 0)) (and (<= (* |v_ULTIMATE.start_diff_~j~0#1_854| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (* |v_ULTIMATE.start_diff_~j~0#1_854| 4) (- 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_854|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_854|) (or (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_278| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_52| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~j~0#1_854| 0)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_278| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_52| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0)))))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_868| Int)) (and (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_868| 4))))) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_868| 4))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_868| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_868| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_868|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:22:50,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 91 [2024-11-14 05:22:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13319536] [2024-11-14 05:22:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:50,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-14 05:22:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-14 05:22:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=9120, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 05:22:50,090 INFO L87 Difference]: Start difference. First operand 504 states and 586 transitions. Second operand has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 92 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:10,234 INFO L93 Difference]: Finished difference Result 1147 states and 1313 transitions. [2024-11-14 05:23:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-14 05:23:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 92 states have internal predecessors, (442), 0 states have call successors, (0), 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 167 [2024-11-14 05:23:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:10,237 INFO L225 Difference]: With dead ends: 1147 [2024-11-14 05:23:10,237 INFO L226 Difference]: Without dead ends: 1147 [2024-11-14 05:23:10,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 417 SyntacticMatches, 14 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11151 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=5762, Invalid=28648, Unknown=0, NotChecked=0, Total=34410 [2024-11-14 05:23:10,239 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 287 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 7989 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 8003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 7989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:10,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 3153 Invalid, 8003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 7989 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 05:23:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-14 05:23:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2024-11-14 05:23:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.1663747810858143) internal successors, (666), 571 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 666 transitions. [2024-11-14 05:23:10,256 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 666 transitions. Word has length 167 [2024-11-14 05:23:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:10,257 INFO L471 AbstractCegarLoop]: Abstraction has 572 states and 666 transitions. [2024-11-14 05:23:10,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.804347826086956) internal successors, (442), 92 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 666 transitions. [2024-11-14 05:23:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-11-14 05:23:10,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:10,261 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:10,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 05:23:10,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 05:23:10,461 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:23:10,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1374181753, now seen corresponding path program 13 times [2024-11-14 05:23:10,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:10,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634210407] [2024-11-14 05:23:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3802 backedges. 3285 proven. 490 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:23:12,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634210407] [2024-11-14 05:23:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634210407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258659587] [2024-11-14 05:23:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:23:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:12,587 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:12,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:23:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:12,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:23:12,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:23:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3802 backedges. 2965 proven. 225 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-14 05:23:13,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:23:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3802 backedges. 2965 proven. 225 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-14 05:23:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258659587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:23:14,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100523388] [2024-11-14 05:23:14,571 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:23:14,571 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:23:14,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:23:14,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:23:14,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:23:17,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:23:24,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34507#(exists ((|v_ULTIMATE.start_diff_~D#1.base_56| Int) (|v_ULTIMATE.start_diff_~k~0#1_309| Int) (|v_ULTIMATE.start_diff_~D#1.offset_54| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_951| Int)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_951|) (= |v_ULTIMATE.start_diff_~k~0#1_309| 0) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_951| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_184| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_56|) (= |v_ULTIMATE.start_diff_~D#1.offset_54| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_184|)))) (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_951| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_951| 4) (- 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_951| 4))))) (= |ULTIMATE.start_diff_~i~0#1| 0))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_970| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_970|) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_970| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_970| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_970| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_970| 4))))))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (+ (* |v_ULTIMATE.start_diff_~k~0#1_309| 4) |v_ULTIMATE.start_diff_~D#1.offset_54|) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_56|) (+ (* |v_ULTIMATE.start_diff_~k~0#1_309| 4) |v_ULTIMATE.start_diff_~D#1.offset_54| 4)))))' at error location [2024-11-14 05:23:24,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:23:24,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:23:24,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 34, 34] total 62 [2024-11-14 05:23:24,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040404541] [2024-11-14 05:23:24,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:23:24,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 05:23:24,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:23:24,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 05:23:24,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 05:23:24,900 INFO L87 Difference]: Start difference. First operand 572 states and 666 transitions. Second operand has 63 states, 63 states have (on average 6.698412698412699) internal successors, (422), 62 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:25,585 INFO L93 Difference]: Finished difference Result 3462 states and 3989 transitions. [2024-11-14 05:23:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:23:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.698412698412699) internal successors, (422), 62 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2024-11-14 05:23:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:25,587 INFO L225 Difference]: With dead ends: 3462 [2024-11-14 05:23:25,587 INFO L226 Difference]: Without dead ends: 575 [2024-11-14 05:23:25,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 718 SyntacticMatches, 57 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 05:23:25,587 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:25,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 538 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:23:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-14 05:23:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 574. [2024-11-14 05:23:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.1657940663176265) internal successors, (668), 573 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 668 transitions. [2024-11-14 05:23:25,598 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 668 transitions. Word has length 268 [2024-11-14 05:23:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:25,598 INFO L471 AbstractCegarLoop]: Abstraction has 574 states and 668 transitions. [2024-11-14 05:23:25,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.698412698412699) internal successors, (422), 62 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 668 transitions. [2024-11-14 05:23:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-14 05:23:25,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:25,600 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 25, 16, 16, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:25,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 05:23:25,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 05:23:25,803 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:23:25,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash 228167061, now seen corresponding path program 14 times [2024-11-14 05:23:25,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:25,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297664786] [2024-11-14 05:23:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:25,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 3285 proven. 521 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:23:27,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297664786] [2024-11-14 05:23:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297664786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004090731] [2024-11-14 05:23:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:23:27,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:27,568 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:27,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:23:32,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-14 05:23:32,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:23:32,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:23:32,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:23:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 1425 proven. 1904 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-14 05:23:34,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:23:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3833 backedges. 1425 proven. 1904 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-14 05:23:35,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004090731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:23:35,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588038089] [2024-11-14 05:23:35,514 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:23:35,515 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:23:35,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:23:35,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:23:35,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:23:38,612 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:23:46,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40269#(exists ((|v_ULTIMATE.start_diff_~k~0#1_340| Int) (|v_ULTIMATE.start_diff_~D#1.offset_56| Int) (|v_ULTIMATE.start_diff_~D#1.base_58| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_56| (* |v_ULTIMATE.start_diff_~k~0#1_340| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_58|) (+ |v_ULTIMATE.start_diff_~D#1.offset_56| (* |v_ULTIMATE.start_diff_~k~0#1_340| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1053| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_340| 0) (= |v_ULTIMATE.start_diff_~j~0#1_1053| 0) (= |ULTIMATE.start_diff_~i~0#1| 0)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_340| 0) (= |ULTIMATE.start_diff_~i~0#1| 0))) (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1053| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_190| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_58|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (= |v_ULTIMATE.start_diff_~D#1.offset_56| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_190|)))) (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1053| 4))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1053| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1053|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1053| 4))))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1053|))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (exists ((|v_ULTIMATE.start_diff_~j~0#1_1072| Int)) (and (or (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1072| 4))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1072| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1072| 4)))))) (and (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~j~0#1_1072| 0))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1072|))) (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:23:46,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:23:46,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:23:46,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 37, 37] total 101 [2024-11-14 05:23:46,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122145192] [2024-11-14 05:23:46,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:23:46,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-14 05:23:46,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:23:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-14 05:23:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=10875, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 05:23:46,868 INFO L87 Difference]: Start difference. First operand 574 states and 668 transitions. Second operand has 102 states, 102 states have (on average 4.950980392156863) internal successors, (505), 101 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:48,444 INFO L93 Difference]: Finished difference Result 3810 states and 4392 transitions. [2024-11-14 05:23:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 05:23:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.950980392156863) internal successors, (505), 101 states have internal predecessors, (505), 0 states have call successors, (0), 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 270 [2024-11-14 05:23:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:48,446 INFO L225 Difference]: With dead ends: 3810 [2024-11-14 05:23:48,446 INFO L226 Difference]: Without dead ends: 577 [2024-11-14 05:23:48,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 702 SyntacticMatches, 41 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11205 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2105, Invalid=14665, Unknown=0, NotChecked=0, Total=16770 [2024-11-14 05:23:48,447 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:48,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 795 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:23:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-14 05:23:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 576. [2024-11-14 05:23:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.1652173913043478) internal successors, (670), 575 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 670 transitions. [2024-11-14 05:23:48,457 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 670 transitions. Word has length 270 [2024-11-14 05:23:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:48,457 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 670 transitions. [2024-11-14 05:23:48,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.950980392156863) internal successors, (505), 101 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 670 transitions. [2024-11-14 05:23:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2024-11-14 05:23:48,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:48,459 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:48,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 05:23:48,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 05:23:48,660 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:23:48,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1807881949, now seen corresponding path program 15 times [2024-11-14 05:23:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002239499] [2024-11-14 05:23:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 3285 proven. 554 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:23:50,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002239499] [2024-11-14 05:23:50,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002239499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230259838] [2024-11-14 05:23:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:23:50,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:50,587 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:50,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:27:01,958 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:27:01,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:27:01,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 05:27:01,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:27:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 3550 proven. 289 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:27:03,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:27:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 3550 proven. 289 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:27:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230259838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:27:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595551136] [2024-11-14 05:27:05,162 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:27:05,163 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:27:05,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:27:05,163 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:27:05,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:27:08,950 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:27:18,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46419#(exists ((|v_ULTIMATE.start_diff_~D#1.base_60| Int) (|v_ULTIMATE.start_diff_~D#1.offset_58| Int) (|v_ULTIMATE.start_diff_~k~0#1_371| Int)) (and (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_58| (* |v_ULTIMATE.start_diff_~k~0#1_371| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_60|) (+ |v_ULTIMATE.start_diff_~D#1.offset_58| (* |v_ULTIMATE.start_diff_~k~0#1_371| 4) 4))) (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1155| Int)) (and (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (or (and (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1155| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1155| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) |ULTIMATE.start_diff_~A#1.offset|))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1155| 4)))) (and (= |v_ULTIMATE.start_diff_~j~0#1_1155| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_196| Int)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (= |v_ULTIMATE.start_diff_~D#1.offset_58| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_diff_~A#1.offset| 0) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_60|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_196|))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1155|) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_371| 0))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1174| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1174|) (or (and (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1174| 4))) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1174| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1174| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (and (= |v_ULTIMATE.start_diff_~j~0#1_1174| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|))))) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))))))' at error location [2024-11-14 05:27:18,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:27:18,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:27:18,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2024-11-14 05:27:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91367299] [2024-11-14 05:27:18,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:27:18,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-14 05:27:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:27:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-14 05:27:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2012, Invalid=8290, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 05:27:18,430 INFO L87 Difference]: Start difference. First operand 576 states and 670 transitions. Second operand has 92 states, 92 states have (on average 6.576086956521739) internal successors, (605), 91 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:27:19,822 INFO L93 Difference]: Finished difference Result 11349 states and 13114 transitions. [2024-11-14 05:27:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-14 05:27:19,823 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 6.576086956521739) internal successors, (605), 91 states have internal predecessors, (605), 0 states have call successors, (0), 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 272 [2024-11-14 05:27:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:27:19,825 INFO L225 Difference]: With dead ends: 11349 [2024-11-14 05:27:19,825 INFO L226 Difference]: Without dead ends: 595 [2024-11-14 05:27:19,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 708 SyntacticMatches, 52 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7394 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2012, Invalid=8290, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 05:27:19,826 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 55 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:27:19,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 680 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 05:27:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-11-14 05:27:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2024-11-14 05:27:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.1602023608768972) internal successors, (688), 593 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 688 transitions. [2024-11-14 05:27:19,841 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 688 transitions. Word has length 272 [2024-11-14 05:27:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:27:19,841 INFO L471 AbstractCegarLoop]: Abstraction has 594 states and 688 transitions. [2024-11-14 05:27:19,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 6.576086956521739) internal successors, (605), 91 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 688 transitions. [2024-11-14 05:27:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-14 05:27:19,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:27:19,844 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2024-11-14 05:27:19,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:27:20,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 05:27:20,044 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:27:20,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:27:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 351796129, now seen corresponding path program 16 times [2024-11-14 05:27:20,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:27:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620347523] [2024-11-14 05:27:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:27:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:27:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4253 backedges. 600 proven. 3626 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:27:24,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:27:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620347523] [2024-11-14 05:27:24,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620347523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:27:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75971045] [2024-11-14 05:27:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:27:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:27:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:27:24,354 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:27:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:27:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:24,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-14 05:27:24,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:27:24,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-14 05:27:24,852 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 05:27:24,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-14 05:27:24,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2024-11-14 05:27:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4253 backedges. 0 proven. 3551 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2024-11-14 05:27:37,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:27:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4253 backedges. 1 proven. 3550 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2024-11-14 05:27:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75971045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:27:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277139234] [2024-11-14 05:27:48,145 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:27:48,145 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:27:48,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:27:48,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:27:48,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:27:50,853 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:28:03,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60267#(exists ((|v_ULTIMATE.start_diff_~D#1.offset_60| Int) (|v_ULTIMATE.start_diff_~D#1.base_62| Int) (|v_ULTIMATE.start_diff_~k~0#1_427| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1257| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1257|) (or (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_60| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_427| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0) (= |v_ULTIMATE.start_diff_~j~0#1_1257| 0)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (= |v_ULTIMATE.start_diff_~D#1.offset_60| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~k~0#1_427| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0))) (or (and (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1257|) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1257| 4))) (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0))) (<= (* |v_ULTIMATE.start_diff_~j~0#1_1257| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (exists ((|v_ULTIMATE.start_main_~i~2#1_202| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_202|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_62|))) (= |v_ULTIMATE.start_diff_~j~0#1_1257| 0))))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1276| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1276| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1276| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1276| 4))))) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1276| 4))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1276|))) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_62|) (+ |v_ULTIMATE.start_diff_~D#1.offset_60| (* |v_ULTIMATE.start_diff_~k~0#1_427| 4) 4)) (< (+ |v_ULTIMATE.start_diff_~D#1.offset_60| (* |v_ULTIMATE.start_diff_~k~0#1_427| 4)) 0))))' at error location [2024-11-14 05:28:03,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:28:03,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:28:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 159 [2024-11-14 05:28:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765876540] [2024-11-14 05:28:03,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:28:03,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2024-11-14 05:28:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:28:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2024-11-14 05:28:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3384, Invalid=26027, Unknown=1, NotChecked=0, Total=29412 [2024-11-14 05:28:03,833 INFO L87 Difference]: Start difference. First operand 594 states and 688 transitions. Second operand has 161 states, 160 states have (on average 4.8125) internal successors, (770), 160 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:01,697 INFO L93 Difference]: Finished difference Result 1815 states and 2059 transitions. [2024-11-14 05:29:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-11-14 05:29:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 160 states have (on average 4.8125) internal successors, (770), 160 states have internal predecessors, (770), 0 states have call successors, (0), 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 290 [2024-11-14 05:29:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:01,700 INFO L225 Difference]: With dead ends: 1815 [2024-11-14 05:29:01,700 INFO L226 Difference]: Without dead ends: 1815 [2024-11-14 05:29:01,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 742 SyntacticMatches, 9 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32117 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=16166, Invalid=87839, Unknown=1, NotChecked=0, Total=104006 [2024-11-14 05:29:01,706 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 1037 mSDsluCounter, 5549 mSDsCounter, 0 mSdLazyCounter, 17434 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 5629 SdHoareTripleChecker+Invalid, 17436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:01,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 5629 Invalid, 17436 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 17434 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2024-11-14 05:29:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2024-11-14 05:29:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 996. [2024-11-14 05:29:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.1618090452261307) internal successors, (1156), 995 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1156 transitions. [2024-11-14 05:29:01,724 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1156 transitions. Word has length 290 [2024-11-14 05:29:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:01,725 INFO L471 AbstractCegarLoop]: Abstraction has 996 states and 1156 transitions. [2024-11-14 05:29:01,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 160 states have (on average 4.8125) internal successors, (770), 160 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1156 transitions. [2024-11-14 05:29:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2024-11-14 05:29:01,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:01,729 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 51, 51, 26, 26, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:01,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 05:29:01,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 05:29:01,934 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:29:01,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1829525313, now seen corresponding path program 17 times [2024-11-14 05:29:01,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220183102] [2024-11-14 05:29:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15264 backedges. 13984 proven. 1227 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 05:29:07,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220183102] [2024-11-14 05:29:07,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220183102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:29:07,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086992631] [2024-11-14 05:29:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:29:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:07,890 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:29:07,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:30:14,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2024-11-14 05:30:14,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:30:14,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 05:30:14,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:30:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15264 backedges. 3834 proven. 7852 refuted. 0 times theorem prover too weak. 3578 trivial. 0 not checked. [2024-11-14 05:30:18,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:30:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15264 backedges. 3834 proven. 7852 refuted. 0 times theorem prover too weak. 3578 trivial. 0 not checked. [2024-11-14 05:30:22,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086992631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:30:22,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427482249] [2024-11-14 05:30:22,433 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 05:30:22,433 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:30:22,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:30:22,434 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:30:22,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:30:25,182 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:30:49,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66697#(exists ((|v_ULTIMATE.start_diff_~D#1.offset_62| Int) (|v_ULTIMATE.start_diff_~D#1.base_64| Int) (|v_ULTIMATE.start_diff_~k~0#1_484| Int)) (and (or (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (<= 0 (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1456| Int)) (and (or (and (= |v_ULTIMATE.start_diff_~j~0#1_1456| 0) (<= (+ |ULTIMATE.start_diff_~i~0#1| 1) |ULTIMATE.start_diff_~l1~0#1|)) (and (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ |ULTIMATE.start_diff_~B#1.offset| (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1456| 4))))) (<= (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1456| 4)) (select |#length| |ULTIMATE.start_diff_~B#1.base|)) (<= 4 (+ |ULTIMATE.start_diff_~B#1.offset| (* |v_ULTIMATE.start_diff_~j~0#1_1456| 4))))) (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1456|)))) (and (<= (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset| 4) (select |#length| |ULTIMATE.start_diff_~A#1.base|)) (= (select |#valid| |ULTIMATE.start_diff_~A#1.base|) 1) (exists ((|v_ULTIMATE.start_diff_~j~0#1_1437| Int)) (and (<= |ULTIMATE.start_diff_~l2~0#1| |v_ULTIMATE.start_diff_~j~0#1_1437|) (or (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (= |v_ULTIMATE.start_diff_~j~0#1_1437| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (= |v_ULTIMATE.start_diff_~D#1.offset_62| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_484| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0)) (and (= |ULTIMATE.start_diff_~B#1.offset| 0) (<= 1 |ULTIMATE.start_diff_~l1~0#1|) (<= 1 |ULTIMATE.start_diff_~l2~0#1|) (= |v_ULTIMATE.start_diff_~D#1.offset_62| 0) (= |ULTIMATE.start_diff_~i~0#1| 0) (= |v_ULTIMATE.start_diff_~k~0#1_484| 0) (= |ULTIMATE.start_diff_~A#1.offset| 0))) (or (and (not (= (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_diff_~B#1.base|) (+ (- 4) (* |v_ULTIMATE.start_diff_~j~0#1_1437| 4))))) (<= 1 |v_ULTIMATE.start_diff_~j~0#1_1437|) (= (select |#valid| |ULTIMATE.start_diff_~B#1.base|) 1) (<= (* |v_ULTIMATE.start_diff_~j~0#1_1437| 4) (select |#length| |ULTIMATE.start_diff_~B#1.base|))) (and (= |v_ULTIMATE.start_diff_~j~0#1_1437| 0) (exists ((|v_ULTIMATE.start_main_~i~2#1_208| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_208|) (<= 2 |v_ULTIMATE.start_diff_~D#1.base_64|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_diff_~A#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_diff_~B#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|))))))) (= |ULTIMATE.start_diff_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_diff_~A#1.base|) (+ (* 4 |ULTIMATE.start_diff_~i~0#1|) |ULTIMATE.start_diff_~A#1.offset|))))) (or (< (+ |v_ULTIMATE.start_diff_~D#1.offset_62| (* |v_ULTIMATE.start_diff_~k~0#1_484| 4)) 0) (< (select |#length| |v_ULTIMATE.start_diff_~D#1.base_64|) (+ |v_ULTIMATE.start_diff_~D#1.offset_62| (* |v_ULTIMATE.start_diff_~k~0#1_484| 4) 4)))))' at error location [2024-11-14 05:30:49,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:30:49,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:30:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 57, 57] total 167 [2024-11-14 05:30:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383908109] [2024-11-14 05:30:49,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:30:49,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2024-11-14 05:30:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2024-11-14 05:30:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4225, Invalid=27281, Unknown=0, NotChecked=0, Total=31506 [2024-11-14 05:30:49,476 INFO L87 Difference]: Start difference. First operand 996 states and 1156 transitions. Second operand has 168 states, 168 states have (on average 5.291666666666667) internal successors, (889), 167 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:54,104 INFO L93 Difference]: Finished difference Result 7428 states and 8590 transitions. [2024-11-14 05:30:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 05:30:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 5.291666666666667) internal successors, (889), 167 states have internal predecessors, (889), 0 states have call successors, (0), 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 524 [2024-11-14 05:30:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:54,109 INFO L225 Difference]: With dead ends: 7428 [2024-11-14 05:30:54,109 INFO L226 Difference]: Without dead ends: 999 [2024-11-14 05:30:54,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1398 SyntacticMatches, 77 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31386 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=5498, Invalid=36732, Unknown=0, NotChecked=0, Total=42230 [2024-11-14 05:30:54,115 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 42 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 3936 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:54,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1632 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3936 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-14 05:30:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2024-11-14 05:30:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 998. [2024-11-14 05:30:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.1614844533600803) internal successors, (1158), 997 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1158 transitions. [2024-11-14 05:30:54,134 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1158 transitions. Word has length 524 [2024-11-14 05:30:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:54,134 INFO L471 AbstractCegarLoop]: Abstraction has 998 states and 1158 transitions. [2024-11-14 05:30:54,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 5.291666666666667) internal successors, (889), 167 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1158 transitions. [2024-11-14 05:30:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2024-11-14 05:30:54,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:54,140 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 51, 51, 27, 27, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:54,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 05:30:54,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:54,341 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:30:54,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash -124748209, now seen corresponding path program 18 times [2024-11-14 05:30:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190543732] [2024-11-14 05:30:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:31:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15317 backedges. 13984 proven. 1280 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 05:31:02,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:31:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190543732] [2024-11-14 05:31:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190543732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:31:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113465628] [2024-11-14 05:31:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:31:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:31:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:31:02,588 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:31:02,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44b84fd-d6fb-4d49-8dd9-7789f6db1f55/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process