./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a15d7a8babeb47c5803852aa414fd44c9c2ce5952463596f56bd26c728f7d82b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:16:22,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:16:22,697 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 13:16:22,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:16:22,702 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:16:22,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:16:22,726 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:16:22,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:16:22,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:16:22,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:16:22,728 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:16:22,729 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:16:22,729 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:16:22,730 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:16:22,730 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:16:22,730 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:16:22,731 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:16:22,731 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:16:22,732 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:16:22,732 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:16:22,733 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:16:22,734 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:16:22,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 13:16:22,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 13:16:22,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:16:22,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:16:22,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:16:22,736 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 13:16:22,737 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 13:16:22,737 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 13:16:22,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:16:22,738 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:16:22,738 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:16:22,739 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:16:22,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:16:22,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:16:22,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:16:22,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:16:22,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:16:22,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:16:22,741 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:16:22,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:16:22,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:16:22,741 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:16:22,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:16:22,742 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a15d7a8babeb47c5803852aa414fd44c9c2ce5952463596f56bd26c728f7d82b [2023-12-02 13:16:22,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:16:22,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:16:22,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:16:22,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:16:22,987 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:16:22,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i [2023-12-02 13:16:25,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:16:25,974 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:16:25,975 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncpy-alloca-1.i [2023-12-02 13:16:25,990 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/data/c8581048c/56ef11b064824d5d8a612ba751dcf9ba/FLAGb19e19362 [2023-12-02 13:16:26,004 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/data/c8581048c/56ef11b064824d5d8a612ba751dcf9ba [2023-12-02 13:16:26,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:16:26,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:16:26,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:16:26,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:16:26,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:16:26,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f56eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26, skipping insertion in model container [2023-12-02 13:16:26,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:16:26,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:16:26,294 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:16:26,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:16:26,353 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:16:26,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26 WrapperNode [2023-12-02 13:16:26,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:16:26,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:16:26,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:16:26,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:16:26,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,390 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-12-02 13:16:26,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:16:26,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:16:26,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:16:26,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:16:26,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,408 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:16:26,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:16:26,418 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:16:26,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:16:26,419 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (1/1) ... [2023-12-02 13:16:26,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:16:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:26,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:16:26,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:16:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:16:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:16:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:16:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:16:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:16:26,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:16:26,575 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:16:26,577 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:16:26,730 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:16:26,783 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:16:26,783 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:16:26,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:16:26 BoogieIcfgContainer [2023-12-02 13:16:26,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:16:26,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:16:26,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:16:26,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:16:26,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:16:26" (1/3) ... [2023-12-02 13:16:26,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db5cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:16:26, skipping insertion in model container [2023-12-02 13:16:26,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:16:26" (2/3) ... [2023-12-02 13:16:26,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db5cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:16:26, skipping insertion in model container [2023-12-02 13:16:26,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:16:26" (3/3) ... [2023-12-02 13:16:26,794 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-1.i [2023-12-02 13:16:26,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:16:26,808 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-12-02 13:16:26,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:16:26,851 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@204238cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:16:26,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-12-02 13:16:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 23 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) [2023-12-02 13:16:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 13:16:26,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:26,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 13:16:26,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:26,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash 3644, now seen corresponding path program 1 times [2023-12-02 13:16:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356282986] [2023-12-02 13:16:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:27,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356282986] [2023-12-02 13:16:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356282986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:27,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:27,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:16:27,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533733228] [2023-12-02 13:16:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:27,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:16:27,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:16:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:16:27,145 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 23 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:27,182 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-02 13:16:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:16:27,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2023-12-02 13:16:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:27,192 INFO L225 Difference]: With dead ends: 23 [2023-12-02 13:16:27,192 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 13:16:27,194 INFO L412 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 [2023-12-02 13:16:27,197 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:27,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 14 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 13:16:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 13:16:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-02 13:16:27,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 2 [2023-12-02 13:16:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:27,224 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-02 13:16:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-02 13:16:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 13:16:27,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:27,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 13:16:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:16:27,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:27,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash 3645, now seen corresponding path program 1 times [2023-12-02 13:16:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:27,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800909828] [2023-12-02 13:16:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:27,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:27,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800909828] [2023-12-02 13:16:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800909828] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 13:16:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875437940] [2023-12-02 13:16:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:16:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:16:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:16:27,468 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:27,493 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-12-02 13:16:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:16:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2023-12-02 13:16:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:27,494 INFO L225 Difference]: With dead ends: 21 [2023-12-02 13:16:27,494 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 13:16:27,495 INFO L412 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 [2023-12-02 13:16:27,496 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:27,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 14 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 13:16:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 13:16:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-02 13:16:27,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 2 [2023-12-02 13:16:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:27,502 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-02 13:16:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-02 13:16:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:16:27,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:27,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:16:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:16:27,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:27,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash 110531968, now seen corresponding path program 1 times [2023-12-02 13:16:27,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:27,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249801443] [2023-12-02 13:16:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:27,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:27,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249801443] [2023-12-02 13:16:27,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249801443] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:27,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:27,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:16:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464989862] [2023-12-02 13:16:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:16:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:16:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:16:27,683 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:27,721 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-12-02 13:16:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:16:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 13:16:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:27,723 INFO L225 Difference]: With dead ends: 30 [2023-12-02 13:16:27,723 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 13:16:27,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:16:27,725 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:27,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 13:16:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2023-12-02 13:16:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-12-02 13:16:27,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2023-12-02 13:16:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:27,730 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-12-02 13:16:27,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-12-02 13:16:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:16:27,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:27,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:16:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:16:27,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:27,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash 110487004, now seen corresponding path program 1 times [2023-12-02 13:16:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:27,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944922749] [2023-12-02 13:16:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:27,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:27,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944922749] [2023-12-02 13:16:27,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944922749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:27,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:27,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:16:27,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62243990] [2023-12-02 13:16:27,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:27,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:16:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:16:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:16:27,811 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:27,863 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-12-02 13:16:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:16:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 13:16:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:27,864 INFO L225 Difference]: With dead ends: 20 [2023-12-02 13:16:27,864 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 13:16:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:16:27,866 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 13:16:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 13:16:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-02 13:16:27,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 5 [2023-12-02 13:16:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:27,870 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-02 13:16:27,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-02 13:16:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:16:27,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:27,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:16:27,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:16:27,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:27,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 110487005, now seen corresponding path program 1 times [2023-12-02 13:16:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:27,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030268533] [2023-12-02 13:16:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:27,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:28,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030268533] [2023-12-02 13:16:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030268533] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:28,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:28,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:16:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389315601] [2023-12-02 13:16:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:16:28,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:16:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:16:28,035 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:28,131 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-12-02 13:16:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:16:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 13:16:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:28,132 INFO L225 Difference]: With dead ends: 26 [2023-12-02 13:16:28,132 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 13:16:28,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:16:28,134 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:28,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:16:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 13:16:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2023-12-02 13:16:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 21 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) [2023-12-02 13:16:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-12-02 13:16:28,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 5 [2023-12-02 13:16:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:28,138 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-12-02 13:16:28,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-12-02 13:16:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 13:16:28,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:28,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 13:16:28,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:16:28,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:28,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -869870171, now seen corresponding path program 1 times [2023-12-02 13:16:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:28,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049807083] [2023-12-02 13:16:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:28,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049807083] [2023-12-02 13:16:28,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049807083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:28,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:28,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:16:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959679926] [2023-12-02 13:16:28,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:28,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:16:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:16:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:16:28,395 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:28,548 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-12-02 13:16:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:16:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 13:16:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:28,549 INFO L225 Difference]: With dead ends: 24 [2023-12-02 13:16:28,549 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 13:16:28,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:16:28,551 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:28,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:16:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 13:16:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-12-02 13:16:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-12-02 13:16:28,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2023-12-02 13:16:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:28,555 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-12-02 13:16:28,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-12-02 13:16:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 13:16:28,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:28,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 13:16:28,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:16:28,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:28,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash -869870172, now seen corresponding path program 1 times [2023-12-02 13:16:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567443819] [2023-12-02 13:16:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:28,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:28,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567443819] [2023-12-02 13:16:28,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567443819] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:28,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:28,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:16:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896568942] [2023-12-02 13:16:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:16:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:16:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:16:28,657 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:28,731 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-12-02 13:16:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:16:28,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 13:16:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:28,732 INFO L225 Difference]: With dead ends: 22 [2023-12-02 13:16:28,732 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 13:16:28,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:16:28,734 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:28,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 13:16:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 13:16:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 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) [2023-12-02 13:16:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-12-02 13:16:28,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2023-12-02 13:16:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-12-02 13:16:28,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-12-02 13:16:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:16:28,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:28,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:16:28,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:28,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 196989163, now seen corresponding path program 1 times [2023-12-02 13:16:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:28,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353708431] [2023-12-02 13:16:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:28,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:29,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:29,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353708431] [2023-12-02 13:16:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353708431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:29,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:29,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:16:29,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242739469] [2023-12-02 13:16:29,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:29,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:16:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:16:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:16:29,229 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:29,708 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-12-02 13:16:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:16:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 13:16:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:29,709 INFO L225 Difference]: With dead ends: 27 [2023-12-02 13:16:29,710 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 13:16:29,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:16:29,711 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:29,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:16:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 13:16:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-12-02 13:16:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4761904761904763) 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) [2023-12-02 13:16:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-02 13:16:29,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2023-12-02 13:16:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:29,715 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-02 13:16:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-02 13:16:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:16:29,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:29,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:16:29,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:29,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 196989162, now seen corresponding path program 1 times [2023-12-02 13:16:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888045051] [2023-12-02 13:16:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:29,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888045051] [2023-12-02 13:16:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888045051] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:16:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134062234] [2023-12-02 13:16:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:16:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:16:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:16:29,769 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:29,831 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-02 13:16:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:16:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 13:16:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:29,832 INFO L225 Difference]: With dead ends: 25 [2023-12-02 13:16:29,832 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 13:16:29,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:16:29,833 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:29,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 13:16:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 13:16:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) 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) [2023-12-02 13:16:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 13:16:29,837 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2023-12-02 13:16:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:29,837 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 13:16:29,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 13:16:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:16:29,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:29,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:29,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:16:29,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:29,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 198319540, now seen corresponding path program 1 times [2023-12-02 13:16:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885585861] [2023-12-02 13:16:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:30,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885585861] [2023-12-02 13:16:30,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885585861] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625819223] [2023-12-02 13:16:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:30,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:30,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:16:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:30,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:16:30,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:30,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-02 13:16:30,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:16:30,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-12-02 13:16:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:30,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:16:31,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-02 13:16:31,065 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 20 treesize of output 16 [2023-12-02 13:16:31,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 13:16:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:31,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625819223] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:16:31,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867633763] [2023-12-02 13:16:31,107 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:16:31,107 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:16:31,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:16:31,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:16:31,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:16:35,199 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:16:37,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '612#(and (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:16:37,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:16:37,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:16:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-12-02 13:16:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175448476] [2023-12-02 13:16:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:16:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 13:16:37,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 13:16:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=767, Unknown=1, NotChecked=0, Total=870 [2023-12-02 13:16:37,421 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2023-12-02 13:16:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:38,011 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-12-02 13:16:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:16:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) Word has length 10 [2023-12-02 13:16:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:38,013 INFO L225 Difference]: With dead ends: 32 [2023-12-02 13:16:38,013 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 13:16:38,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=190, Invalid=1215, Unknown=1, NotChecked=0, Total=1406 [2023-12-02 13:16:38,015 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:38,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 77 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:16:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 13:16:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-12-02 13:16:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) 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) [2023-12-02 13:16:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-12-02 13:16:38,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2023-12-02 13:16:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:38,019 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-12-02 13:16:38,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2023-12-02 13:16:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-12-02 13:16:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 13:16:38,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:38,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:38,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:16:38,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:16:38,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:38,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1852917995, now seen corresponding path program 1 times [2023-12-02 13:16:38,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:38,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332771029] [2023-12-02 13:16:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:38,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:38,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332771029] [2023-12-02 13:16:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332771029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:16:38,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:16:38,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:16:38,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349460972] [2023-12-02 13:16:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:16:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:16:38,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:16:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:16:38,351 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-12-02 13:16:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:38,369 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-12-02 13:16:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:16:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2023-12-02 13:16:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:38,370 INFO L225 Difference]: With dead ends: 27 [2023-12-02 13:16:38,370 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 13:16:38,371 INFO L412 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 [2023-12-02 13:16:38,371 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:38,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:16:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 13:16:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 13:16:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 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) [2023-12-02 13:16:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-12-02 13:16:38,374 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2023-12-02 13:16:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:38,375 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-12-02 13:16:38,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-12-02 13:16:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-12-02 13:16:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 13:16:38,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:38,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 13:16:38,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:38,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1852938414, now seen corresponding path program 1 times [2023-12-02 13:16:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:38,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600875833] [2023-12-02 13:16:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:38,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600875833] [2023-12-02 13:16:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600875833] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979480825] [2023-12-02 13:16:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:38,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:38,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:16:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:38,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 13:16:38,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:16:38,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 13:16:38,932 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 [2023-12-02 13:16:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:39,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:16:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979480825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:16:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992471386] [2023-12-02 13:16:39,668 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:16:39,669 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:16:39,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:16:39,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:16:39,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:16:41,765 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:16:43,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '837#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:16:43,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:16:43,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:16:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-12-02 13:16:43,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3243093] [2023-12-02 13:16:43,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:16:43,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 13:16:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 13:16:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1002, Unknown=1, NotChecked=0, Total=1122 [2023-12-02 13:16:43,842 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2023-12-02 13:16:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:44,520 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-12-02 13:16:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:16:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 13:16:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:44,521 INFO L225 Difference]: With dead ends: 26 [2023-12-02 13:16:44,521 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 13:16:44,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=230, Invalid=1661, Unknown=1, NotChecked=0, Total=1892 [2023-12-02 13:16:44,523 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:44,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:16:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 13:16:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-12-02 13:16:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-12-02 13:16:44,525 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2023-12-02 13:16:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:44,526 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-12-02 13:16:44,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2023-12-02 13:16:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-12-02 13:16:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:16:44,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:44,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:44,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:16:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:44,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:44,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1579702628, now seen corresponding path program 1 times [2023-12-02 13:16:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:44,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629707594] [2023-12-02 13:16:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:45,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629707594] [2023-12-02 13:16:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629707594] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873199265] [2023-12-02 13:16:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:45,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:45,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:45,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:16:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:45,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 13:16:45,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:16:45,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 13:16:45,321 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 [2023-12-02 13:16:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:45,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:16:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873199265] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:16:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475240532] [2023-12-02 13:16:46,302 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:16:46,302 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:16:46,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:16:46,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:16:46,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:16:47,761 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:16:50,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020#(and (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#t~post7#1.base| |ULTIMATE.start_cstrncpy_~d~0#1.base|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= |ULTIMATE.start_cstrncpy_~s~0#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (exists ((|v_ULTIMATE.start_cstrncpy_#t~pre6#1_21| Int)) (not (= (mod |v_ULTIMATE.start_cstrncpy_#t~pre6#1_21| 18446744073709551616) 0))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:16:50,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:16:50,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:16:50,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-12-02 13:16:50,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988976871] [2023-12-02 13:16:50,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:16:50,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:16:50,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:16:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:16:50,334 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:51,479 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-12-02 13:16:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 13:16:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 13:16:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:51,480 INFO L225 Difference]: With dead ends: 31 [2023-12-02 13:16:51,480 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 13:16:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 13:16:51,482 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 21 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:16:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 13:16:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 13:16:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-12-02 13:16:51,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2023-12-02 13:16:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:51,485 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-12-02 13:16:51,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:16:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-12-02 13:16:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:16:51,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:51,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:51,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:16:51,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:51,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:16:51,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 896395124, now seen corresponding path program 1 times [2023-12-02 13:16:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:51,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776352933] [2023-12-02 13:16:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:52,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776352933] [2023-12-02 13:16:52,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776352933] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974631022] [2023-12-02 13:16:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:52,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:52,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:52,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:16:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:52,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 13:16:52,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:16:52,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 13:16:52,271 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 [2023-12-02 13:16:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:52,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:16:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:16:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974631022] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:16:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80052265] [2023-12-02 13:16:53,510 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 13:16:53,510 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:16:53,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:16:53,511 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:16:53,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:16:55,702 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:16:59,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1232#(and (= |ULTIMATE.start_cstrncpy_#t~post7#1.base| |ULTIMATE.start_cstrncpy_~d~0#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (not (= (mod |ULTIMATE.start_cstrncpy_~n#1| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_43| Int) (|v_ULTIMATE.start_cstrncpy_#t~post4#1.base_44| Int) (|v_#memory_int_47| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_43| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44| Int)) (and (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_44|) 1) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_43|) (= (select |#valid| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44|) 1) (= (select (select |v_#memory_int_47| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_44|) |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_43|) 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_43|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_44|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_43| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44|)) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |#memory_int| (store |v_#memory_int_47| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44| (store (select |v_#memory_int_47| |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_43| 0))) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_43| 1) (select |#length| |v_ULTIMATE.start_cstrncpy_#t~post4#1.base_44|)) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 2 |v_ULTIMATE.start_cstrncpy_#t~post3#1.base_44|))) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) |ULTIMATE.start_cstrncpy_#t~post7#1.offset|))' at error location [2023-12-02 13:16:59,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:16:59,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:16:59,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-12-02 13:16:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398523408] [2023-12-02 13:16:59,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:16:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 13:16:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 13:16:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1787, Unknown=4, NotChecked=0, Total=1980 [2023-12-02 13:16:59,110 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:00,423 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2023-12-02 13:17:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 13:17:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 13:17:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:00,424 INFO L225 Difference]: With dead ends: 25 [2023-12-02 13:17:00,424 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 13:17:00,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=404, Invalid=3132, Unknown=4, NotChecked=0, Total=3540 [2023-12-02 13:17:00,426 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:00,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:17:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 13:17:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-02 13:17:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-12-02 13:17:00,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2023-12-02 13:17:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:00,428 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-12-02 13:17:00,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-12-02 13:17:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:17:00,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:00,428 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 13:17:00,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:17:00,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:00,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:17:00,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 897725501, now seen corresponding path program 2 times [2023-12-02 13:17:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194488189] [2023-12-02 13:17:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:01,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:01,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194488189] [2023-12-02 13:17:01,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194488189] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:17:01,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433785971] [2023-12-02 13:17:01,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:17:01,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:01,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:01,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:01,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:17:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:17:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:17:01,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 13:17:01,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:01,395 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 [2023-12-02 13:17:01,419 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 14 treesize of output 10 [2023-12-02 13:17:01,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-12-02 13:17:01,814 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-12-02 13:17:01,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2023-12-02 13:17:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:01,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:17:02,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:17:02,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2023-12-02 13:17:02,394 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 38 treesize of output 34 [2023-12-02 13:17:02,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:17:02,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2023-12-02 13:17:02,409 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 15 treesize of output 11 [2023-12-02 13:17:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:02,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433785971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:17:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789347641] [2023-12-02 13:17:02,458 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:17:02,458 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:17:02,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:17:02,458 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:17:02,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:17:04,232 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:17:06,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:17:06,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:17:06,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:17:06,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-12-02 13:17:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46684013] [2023-12-02 13:17:06,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:17:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 13:17:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:17:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 13:17:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1580, Unknown=3, NotChecked=0, Total=1722 [2023-12-02 13:17:06,405 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:07,804 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2023-12-02 13:17:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:17:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 13:17:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:07,805 INFO L225 Difference]: With dead ends: 25 [2023-12-02 13:17:07,805 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 13:17:07,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=318, Invalid=2649, Unknown=3, NotChecked=0, Total=2970 [2023-12-02 13:17:07,807 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 97 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:07,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:17:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 13:17:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-12-02 13:17:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-12-02 13:17:07,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2023-12-02 13:17:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:07,810 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-12-02 13:17:07,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-12-02 13:17:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:17:07,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:07,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 13:17:07,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:17:08,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:17:08,012 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:17:08,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2059686725, now seen corresponding path program 2 times [2023-12-02 13:17:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:08,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578630343] [2023-12-02 13:17:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:08,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578630343] [2023-12-02 13:17:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578630343] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:17:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541951649] [2023-12-02 13:17:08,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:17:08,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:08,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:08,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:08,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:17:08,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:17:08,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:17:08,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-02 13:17:08,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:08,577 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 [2023-12-02 13:17:08,580 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 [2023-12-02 13:17:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:09,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:17:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541951649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:17:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671073583] [2023-12-02 13:17:10,307 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:17:10,307 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:17:10,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:17:10,308 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:17:10,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:17:12,264 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:17:14,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1644#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:17:14,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:17:14,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:17:14,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-12-02 13:17:14,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689840076] [2023-12-02 13:17:14,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:17:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 13:17:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:17:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 13:17:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2000, Unknown=1, NotChecked=0, Total=2162 [2023-12-02 13:17:14,944 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:17,492 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2023-12-02 13:17:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 13:17:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 13:17:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:17,493 INFO L225 Difference]: With dead ends: 23 [2023-12-02 13:17:17,493 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 13:17:17,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=397, Invalid=3508, Unknown=1, NotChecked=0, Total=3906 [2023-12-02 13:17:17,495 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:17,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:17:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 13:17:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-12-02 13:17:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-12-02 13:17:17,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2023-12-02 13:17:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:17,497 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-12-02 13:17:17,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-12-02 13:17:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:17:17,498 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:17,498 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1] [2023-12-02 13:17:17,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:17:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:17:17,699 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:17:17,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash 238537556, now seen corresponding path program 3 times [2023-12-02 13:17:17,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:17,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862789320] [2023-12-02 13:17:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:18,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862789320] [2023-12-02 13:17:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862789320] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:17:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022232626] [2023-12-02 13:17:18,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:17:18,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:18,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:18,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:17:18,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:17:18,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:17:18,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 13:17:18,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:18,541 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 [2023-12-02 13:17:18,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 13:17:18,834 INFO L349 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2023-12-02 13:17:18,835 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 28 treesize of output 30 [2023-12-02 13:17:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:19,204 INFO L349 Elim1Store]: treesize reduction 120, result has 28.1 percent of original size [2023-12-02 13:17:19,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 67 [2023-12-02 13:17:20,043 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-12-02 13:17:20,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 93 treesize of output 241 [2023-12-02 13:17:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:24,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:17:26,041 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 2117 treesize of output 1989 [2023-12-02 13:17:26,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 232 [2023-12-02 13:17:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022232626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:17:26,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764822618] [2023-12-02 13:17:26,279 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:17:26,279 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:17:26,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:17:26,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:17:26,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:17:28,023 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:17:30,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1887#(and (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:17:30,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:17:30,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:17:30,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2023-12-02 13:17:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535453223] [2023-12-02 13:17:30,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:17:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 13:17:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:17:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 13:17:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2547, Unknown=1, NotChecked=0, Total=2756 [2023-12-02 13:17:30,495 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:34,384 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-12-02 13:17:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 13:17:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 13:17:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:34,386 INFO L225 Difference]: With dead ends: 33 [2023-12-02 13:17:34,386 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 13:17:34,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=527, Invalid=4728, Unknown=1, NotChecked=0, Total=5256 [2023-12-02 13:17:34,388 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 103 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:34,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 62 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:17:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 13:17:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-12-02 13:17:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 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) [2023-12-02 13:17:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2023-12-02 13:17:34,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2023-12-02 13:17:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:34,390 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2023-12-02 13:17:34,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2023-12-02 13:17:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:17:34,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:34,391 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1] [2023-12-02 13:17:34,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:17:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:17:34,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:17:34,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1306988300, now seen corresponding path program 4 times [2023-12-02 13:17:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134026184] [2023-12-02 13:17:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:35,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134026184] [2023-12-02 13:17:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134026184] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:17:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411462424] [2023-12-02 13:17:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:17:35,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:35,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:35,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:17:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:35,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-02 13:17:35,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:35,872 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 [2023-12-02 13:17:35,903 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 14 treesize of output 10 [2023-12-02 13:17:36,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-12-02 13:17:36,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-12-02 13:17:36,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-12-02 13:17:37,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-12-02 13:17:37,401 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-12-02 13:17:37,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 47 [2023-12-02 13:17:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:37,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:17:39,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:17:39,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2023-12-02 13:17:39,913 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 113 treesize of output 103 [2023-12-02 13:17:39,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:17:39,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:17:39,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2023-12-02 13:17:39,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-02 13:17:39,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:17:39,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:17:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411462424] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:17:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100865310] [2023-12-02 13:17:40,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:17:40,050 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:17:40,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:17:40,050 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:17:40,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:17:41,985 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:17:45,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2240#(and (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:17:45,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:17:45,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:17:45,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 65 [2023-12-02 13:17:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318929898] [2023-12-02 13:17:45,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:17:45,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-02 13:17:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:17:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-02 13:17:45,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=5196, Unknown=39, NotChecked=0, Total=5550 [2023-12-02 13:17:45,111 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:17:54,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:17:56,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:17:58,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:18:00,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:18:06,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:18:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:18:09,076 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2023-12-02 13:18:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 13:18:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 13:18:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:18:09,077 INFO L225 Difference]: With dead ends: 53 [2023-12-02 13:18:09,077 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 13:18:09,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=911, Invalid=10575, Unknown=70, NotChecked=0, Total=11556 [2023-12-02 13:18:09,082 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 169 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 55 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:18:09,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 172 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 992 Invalid, 35 Unknown, 0 Unchecked, 11.8s Time] [2023-12-02 13:18:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 13:18:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-12-02 13:18:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2023-12-02 13:18:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2023-12-02 13:18:09,085 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2023-12-02 13:18:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:18:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2023-12-02 13:18:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:18:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2023-12-02 13:18:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 13:18:09,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:18:09,087 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1] [2023-12-02 13:18:09,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:18:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:18:09,288 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:18:09,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:18:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1309301708, now seen corresponding path program 5 times [2023-12-02 13:18:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:18:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914117352] [2023-12-02 13:18:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:18:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:18:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:18:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:18:12,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:18:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914117352] [2023-12-02 13:18:12,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914117352] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:18:12,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223310020] [2023-12-02 13:18:12,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:18:12,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:18:12,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:18:12,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:18:12,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:18:12,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-02 13:18:12,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:18:12,692 WARN L260 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 225 conjunts are in the unsatisfiable core [2023-12-02 13:18:12,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:18:12,704 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 [2023-12-02 13:18:12,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 13:18:13,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-12-02 13:18:13,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-12-02 13:18:14,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-12-02 13:18:14,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-12-02 13:18:15,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 42 [2023-12-02 13:18:16,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 48 [2023-12-02 13:18:16,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 54 [2023-12-02 13:18:17,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 60 [2023-12-02 13:18:18,472 INFO L349 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2023-12-02 13:18:18,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 79 [2023-12-02 13:18:18,477 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-12-02 13:18:18,489 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-12-02 13:18:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:18:18,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:19:22,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:19:22,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 120 [2023-12-02 13:19:22,175 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2023-12-02 13:19:22,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2023-12-02 13:19:22,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:19:22,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:19:22,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 219 treesize of output 224 [2023-12-02 13:19:22,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,278 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 7 treesize of output 3 [2023-12-02 13:19:22,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-02 13:19:22,377 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-12-02 13:19:22,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:19:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:19:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223310020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:19:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994622041] [2023-12-02 13:19:22,563 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 13:19:22,563 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:19:22,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:19:22,564 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:19:22,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:19:24,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:19:29,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2823#(and (<= 2 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src#1.base|) (= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~src#1.base|))' at error location [2023-12-02 13:19:29,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:19:29,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:19:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39, 39] total 109 [2023-12-02 13:19:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417039425] [2023-12-02 13:19:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:19:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-12-02 13:19:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:19:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-12-02 13:19:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=12974, Unknown=284, NotChecked=0, Total=14042 [2023-12-02 13:19:29,618 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 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) [2023-12-02 13:19:47,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:50,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:52,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:53,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:55,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:56,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:58,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:19:59,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:01,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:03,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:06,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:07,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:09,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:10,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:12,837 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse14 (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (.cse39 (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse36 (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse41 (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse31 (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) (.cse34 (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) (.cse35 (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) (.cse30 (select |c_#length| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (.cse32 (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))) (let ((.cse11 (< .cse32 0)) (.cse12 (< .cse35 .cse30)) (.cse13 (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (let ((.cse44 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_315))) (or (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0) (= (select (select (store .cse44 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select .cse44 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))))) (.cse24 (< .cse41 0)) (.cse25 (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_314 (Array Int Int)) (v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (v_ArrVal_311 (Array Int Int)) (v_ArrVal_313 (Array Int Int)) (v_ArrVal_312 (Array Int Int))) (let ((.cse43 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_311))) (or (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_314) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse39) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0) (= 0 (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36)) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse41) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_312) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse43 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0) (= (select (select .cse43 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))))) (.cse26 (< (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8) .cse30)) (.cse8 (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_314 (Array Int Int)) (v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (v_ArrVal_313 (Array Int Int)) (v_ArrVal_312 (Array Int Int))) (let ((.cse42 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_312))) (or (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_314) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select .cse42 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse42 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse39) 0))))) (.cse9 (< .cse41 .cse30)) (.cse10 (< .cse39 0)) (.cse23 (forall ((v_ArrVal_318 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))) (.cse21 (< |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 0)) (.cse22 (< .cse34 .cse30)) (.cse0 (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_314 (Array Int Int)) (v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (v_ArrVal_313 (Array Int Int))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_313))) (or (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select .cse40 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_314) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse36) 0) (= (select (select (store .cse40 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0))))) (.cse2 (< .cse36 0)) (.cse3 (< .cse39 .cse30)) (.cse28 (not (= |c_ULTIMATE.start_main_~nondetString~0#1.base| |c_ULTIMATE.start_main_~nondetArea~0#1.base|))) (.cse18 (< .cse34 0)) (.cse19 (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (let ((.cse38 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_317))) (or (= (select (select (store .cse38 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select .cse38 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))))) (.cse20 (< .cse31 .cse30)) (.cse4 (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_314 (Array Int Int)) (v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_314))) (or (= (select (select (store .cse37 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse37 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse35) 0) (= (select (select .cse37 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) (= (select (select (store .cse37 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse32) 0) (= (select (select (store .cse37 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_316) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0))))) (.cse5 (< .cse36 .cse30)) (.cse1 (= (select .cse14 |c_ULTIMATE.start_cstrncpy_#t~post4#1.offset|) 0)) (.cse7 (< .cse35 0)) (.cse15 (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_316 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (let ((.cse33 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_316))) (or (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse34) 0) (= (select (select (store .cse33 |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_318) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) .cse31) 0) (= (select (select .cse33 |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0))))) (.cse16 (< .cse32 .cse30)) (.cse17 (< .cse31 0)) (.cse6 (= |c_ULTIMATE.start_cstrncpy_#t~mem5#1| 0))) (and (or .cse0 .cse1 .cse2 .cse3) (or .cse4 .cse5 .cse6 .cse7) (or .cse1 .cse8 .cse9 .cse10) (or .cse11 .cse12 .cse6 .cse13) (not (= (select .cse14 5) 0)) (or .cse15 .cse16 .cse17 .cse1) (or .cse18 .cse19 .cse6 .cse20) (= 0 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (or .cse11 .cse12 .cse1 .cse13) (or .cse21 .cse22 .cse1 .cse23) (or .cse24 .cse25 .cse6 .cse26) (let ((.cse29 (div |c_ULTIMATE.start_main_~length~0#1| 18446744073709551616))) (let ((.cse27 (+ (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|) (* 18446744073709551616 .cse29)))) (or (and (<= 1 .cse27) (<= .cse27 |c_ULTIMATE.start_main_~length~0#1|) .cse28) (and (or (< .cse29 0) (< .cse27 2)) (or (< 0 (+ .cse29 1)) (< 0 .cse27)))))) (or (and (= .cse30 9) .cse6) (< 9 .cse30)) (exists ((|ULTIMATE.start_main_~length~0#1| Int)) (and (= (select .cse14 (+ (- 1) |ULTIMATE.start_main_~length~0#1|)) 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~length~0#1| (select |c_#length| |c_ULTIMATE.start_cstrncpy_#t~post4#1.base|)))) (= 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) (or .cse24 .cse25 .cse1 .cse26) (or .cse6 .cse8 .cse9 .cse10) (or .cse21 .cse22 .cse6 .cse23) (not (= (select .cse14 6) 0)) (or .cse21 .cse22 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0) .cse6) (not (= (select .cse14 0) 0)) (or .cse0 .cse6 .cse2 .cse3) (not (= (select .cse14 4) 0)) .cse28 (or .cse18 .cse19 .cse1 .cse20) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (not (= (select .cse14 2) 0)) (not (= (select .cse14 3) 0)) (= 8 |c_ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (not (= (select .cse14 1) 0)) (= |c_ULTIMATE.start_cstrncpy_#t~post4#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (or .cse4 .cse5 .cse1 .cse7) (not (= (select .cse14 7) 0)) (or .cse15 .cse16 .cse17 .cse6)))) is different from true [2023-12-02 13:20:25,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:20:27,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:20:28,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:20:30,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:20:32,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:20:34,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:20:36,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:06,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:08,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:10,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:11,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-02 13:21:14,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:15,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:17,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:19,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:20,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:22,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:33,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:36,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:38,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:49,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:52,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:21:54,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 13:22:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:22,380 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2023-12-02 13:22:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-02 13:22:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 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) Word has length 50 [2023-12-02 13:22:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:22,382 INFO L225 Difference]: With dead ends: 98 [2023-12-02 13:22:22,382 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 13:22:22,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5445 ImplicationChecksByTransitivity, 165.7s TimeCoverageRelationStatistics Valid=2191, Invalid=29581, Unknown=452, NotChecked=356, Total=32580 [2023-12-02 13:22:22,386 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 209 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 117 mSolverCounterUnsat, 120 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 120 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 80.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:22,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 513 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2404 Invalid, 120 Unknown, 99 Unchecked, 80.1s Time] [2023-12-02 13:22:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 13:22:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-12-02 13:22:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2023-12-02 13:22:22,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 50 [2023-12-02 13:22:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:22,392 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2023-12-02 13:22:22,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 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) [2023-12-02 13:22:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2023-12-02 13:22:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:22:22,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:22,395 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1] [2023-12-02 13:22:22,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:22:22,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:22,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-12-02 13:22:22,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash 934528829, now seen corresponding path program 6 times [2023-12-02 13:22:22,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:22,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886348753] [2023-12-02 13:22:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:22,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:29,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886348753] [2023-12-02 13:22:29,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886348753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588230038] [2023-12-02 13:22:29,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:22:29,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:29,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:29,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33aae836-d7a0-4df6-82f0-1edaa5ca5fa9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:22:30,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:22:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:30,374 WARN L260 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 405 conjunts are in the unsatisfiable core [2023-12-02 13:22:30,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:30,390 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 [2023-12-02 13:22:30,396 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 [2023-12-02 13:22:30,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 13:22:31,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-12-02 13:22:31,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-12-02 13:22:32,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-12-02 13:22:33,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-12-02 13:22:34,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 42 [2023-12-02 13:22:34,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 48 [2023-12-02 13:22:35,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 54 [2023-12-02 13:22:36,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 60 [2023-12-02 13:22:38,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 66 [2023-12-02 13:22:39,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 72 [2023-12-02 13:22:40,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 78 [2023-12-02 13:22:42,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 84 [2023-12-02 13:22:43,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 90 [2023-12-02 13:22:45,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 96 [2023-12-02 13:22:47,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 102 [2023-12-02 13:22:49,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 108 [2023-12-02 13:22:51,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 114 [2023-12-02 13:22:53,093 INFO L349 Elim1Store]: treesize reduction 68, result has 53.1 percent of original size [2023-12-02 13:22:53,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 153 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 18 case distinctions, treesize of input 153 treesize of output 151 [2023-12-02 13:22:53,101 WARN L667 sPolynomialRelations]: Constructing 262144(two to the power of 18 dual juncts. [2023-12-02 13:23:12,451 WARN L667 sPolynomialRelations]: Constructing 131072(two to the power of 17 dual juncts. [2023-12-02 13:23:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:21,801 INFO L327 TraceCheckSpWp]: Computing backward predicates...