./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-fst-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-fst-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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 0c43b1e86d53f0a623ddcdf970bae6b5fd24ed69ec4a9688050aa705dc6cf897 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:03:03,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:03:03,067 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 20:03:03,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:03:03,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:03:03,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:03:03,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:03:03,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:03:03,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:03:03,095 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:03:03,096 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:03:03,096 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:03:03,097 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:03:03,097 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:03:03,098 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:03:03,098 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:03:03,099 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:03:03,099 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:03:03,100 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:03:03,100 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:03:03,101 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:03:03,104 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:03:03,104 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:03:03,105 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:03:03,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:03:03,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:03:03,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:03:03,107 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:03:03,107 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:03:03,107 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 20:03:03,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:03:03,108 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:03:03,108 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:03:03,109 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:03:03,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:03:03,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:03:03,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:03:03,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:03:03,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:03:03,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:03:03,110 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_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c43b1e86d53f0a623ddcdf970bae6b5fd24ed69ec4a9688050aa705dc6cf897 [2023-12-02 20:03:03,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:03:03,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:03:03,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:03:03,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:03:03,332 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:03:03,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/dll-fst-data.i [2023-12-02 20:03:06,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:03:06,295 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:03:06,295 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/sv-benchmarks/c/memsafety-broom/dll-fst-data.i [2023-12-02 20:03:06,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/a244708e9/55015258f32c4680ac710322bffa0ceb/FLAGdee76c5ed [2023-12-02 20:03:06,337 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/a244708e9/55015258f32c4680ac710322bffa0ceb [2023-12-02 20:03:06,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:03:06,340 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:03:06,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:03:06,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:03:06,347 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:03:06,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ffd535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06, skipping insertion in model container [2023-12-02 20:03:06,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,424 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:03:06,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:03:06,696 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:03:06,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:03:06,769 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:03:06,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06 WrapperNode [2023-12-02 20:03:06,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:03:06,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:03:06,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:03:06,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:03:06,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,814 INFO L138 Inliner]: procedures = 121, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2023-12-02 20:03:06,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:03:06,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:03:06,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:03:06,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:03:06,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,828 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,836 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,843 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:03:06,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:03:06,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:03:06,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:03:06,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (1/1) ... [2023-12-02 20:03:06,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:03:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:06,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:03:06,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:03:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 20:03:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 20:03:06,919 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 20:03:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:03:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:03:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:03:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:03:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:03:06,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:03:07,023 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:03:07,025 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:03:07,258 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:03:07,311 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:03:07,311 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 20:03:07,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:03:07 BoogieIcfgContainer [2023-12-02 20:03:07,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:03:07,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:03:07,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:03:07,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:03:07,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:03:06" (1/3) ... [2023-12-02 20:03:07,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8fbd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:03:07, skipping insertion in model container [2023-12-02 20:03:07,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:03:06" (2/3) ... [2023-12-02 20:03:07,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8fbd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:03:07, skipping insertion in model container [2023-12-02 20:03:07,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:03:07" (3/3) ... [2023-12-02 20:03:07,323 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-fst-data.i [2023-12-02 20:03:07,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:03:07,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 20:03:07,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:03:07,384 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;@39e59bf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:03:07,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-12-02 20:03:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 20:03:07,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:07,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 20:03:07,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:07,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:07,398 INFO L85 PathProgramCache]: Analyzing trace with hash 4452315, now seen corresponding path program 1 times [2023-12-02 20:03:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57081012] [2023-12-02 20:03:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:07,583 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 20:03:07,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:07,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57081012] [2023-12-02 20:03:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57081012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:07,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:07,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:03:07,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494866062] [2023-12-02 20:03:07,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:07,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:03:07,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:03:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:03:07,618 INFO L87 Difference]: Start difference. First operand has 56 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:07,709 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2023-12-02 20:03:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:03:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 20:03:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:07,718 INFO L225 Difference]: With dead ends: 53 [2023-12-02 20:03:07,718 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 20:03:07,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:03:07,723 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:07,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 20:03:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 20:03:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 2.125) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-12-02 20:03:07,757 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 4 [2023-12-02 20:03:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:07,757 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-12-02 20:03:07,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-12-02 20:03:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 20:03:07,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:07,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 20:03:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:03:07,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:07,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash 4452316, now seen corresponding path program 1 times [2023-12-02 20:03:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245324455] [2023-12-02 20:03:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:07,849 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 20:03:07,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245324455] [2023-12-02 20:03:07,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245324455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:07,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:07,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:03:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667567314] [2023-12-02 20:03:07,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:07,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:03:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:03:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:03:07,853 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:07,918 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-12-02 20:03:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:03:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 20:03:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:07,920 INFO L225 Difference]: With dead ends: 49 [2023-12-02 20:03:07,920 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 20:03:07,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:03:07,922 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:07,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 20:03:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-02 20:03:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 2.0) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-12-02 20:03:07,931 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 4 [2023-12-02 20:03:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-12-02 20:03:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-12-02 20:03:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:03:07,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:07,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 20:03:07,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -62470296, now seen corresponding path program 1 times [2023-12-02 20:03:07,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:07,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441611592] [2023-12-02 20:03:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:08,082 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 20:03:08,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441611592] [2023-12-02 20:03:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441611592] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:08,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:03:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189029389] [2023-12-02 20:03:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:08,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:03:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:03:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:03:08,086 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:08,256 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-12-02 20:03:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:03:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 20:03:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:08,259 INFO L225 Difference]: With dead ends: 49 [2023-12-02 20:03:08,259 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 20:03:08,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:08,261 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:08,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 77 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 20:03:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-12-02 20:03:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-12-02 20:03:08,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 9 [2023-12-02 20:03:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:08,271 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-12-02 20:03:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-12-02 20:03:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:03:08,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:08,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:08,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 20:03:08,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:08,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash -62470295, now seen corresponding path program 1 times [2023-12-02 20:03:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:08,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255128093] [2023-12-02 20:03:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:08,460 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 20:03:08,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255128093] [2023-12-02 20:03:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255128093] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:08,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:08,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:03:08,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051589145] [2023-12-02 20:03:08,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:08,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:03:08,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:03:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:03:08,463 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:08,586 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-12-02 20:03:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:03:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 20:03:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:08,588 INFO L225 Difference]: With dead ends: 48 [2023-12-02 20:03:08,588 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 20:03:08,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:08,590 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:08,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 97 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 20:03:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-12-02 20:03:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-12-02 20:03:08,597 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 9 [2023-12-02 20:03:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:08,597 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-12-02 20:03:08,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-12-02 20:03:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:03:08,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:08,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 20:03:08,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1175375798, now seen corresponding path program 1 times [2023-12-02 20:03:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617768717] [2023-12-02 20:03:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:08,711 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 20:03:08,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617768717] [2023-12-02 20:03:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617768717] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:08,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:03:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788094425] [2023-12-02 20:03:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:03:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:03:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:08,714 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:08,845 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-12-02 20:03:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:03:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 20:03:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:08,847 INFO L225 Difference]: With dead ends: 51 [2023-12-02 20:03:08,847 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 20:03:08,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:03:08,849 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:08,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 20:03:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-12-02 20:03:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-12-02 20:03:08,855 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 14 [2023-12-02 20:03:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:08,856 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-12-02 20:03:08,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-12-02 20:03:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:03:08,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:08,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:08,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 20:03:08,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:08,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1175375797, now seen corresponding path program 1 times [2023-12-02 20:03:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717289797] [2023-12-02 20:03:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:08,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:09,111 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 20:03:09,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:09,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717289797] [2023-12-02 20:03:09,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717289797] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:09,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:09,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:03:09,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630672137] [2023-12-02 20:03:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:09,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:03:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:03:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:09,114 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:09,251 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-12-02 20:03:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:03:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 20:03:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:09,255 INFO L225 Difference]: With dead ends: 50 [2023-12-02 20:03:09,255 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 20:03:09,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:03:09,256 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:09,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 20:03:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-12-02 20:03:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 45 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-12-02 20:03:09,262 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 14 [2023-12-02 20:03:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:09,262 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-12-02 20:03:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-12-02 20:03:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 20:03:09,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:09,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 20:03:09,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:09,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2076907639, now seen corresponding path program 1 times [2023-12-02 20:03:09,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:09,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345462111] [2023-12-02 20:03:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:09,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:09,357 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 20:03:09,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345462111] [2023-12-02 20:03:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345462111] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:09,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:03:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106919445] [2023-12-02 20:03:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:03:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:03:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:09,359 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:09,439 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-12-02 20:03:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:03:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 20:03:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:09,441 INFO L225 Difference]: With dead ends: 53 [2023-12-02 20:03:09,441 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 20:03:09,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:03:09,442 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:09,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 162 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 20:03:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-12-02 20:03:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-02 20:03:09,448 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 15 [2023-12-02 20:03:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:09,448 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-02 20:03:09,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-02 20:03:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 20:03:09,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:09,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 20:03:09,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:09,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash 40303171, now seen corresponding path program 1 times [2023-12-02 20:03:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122487333] [2023-12-02 20:03:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:09,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122487333] [2023-12-02 20:03:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122487333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266339916] [2023-12-02 20:03:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:09,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:09,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:03:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:10,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 20:03:10,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:10,101 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 11 treesize of output 7 [2023-12-02 20:03:10,108 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 11 treesize of output 7 [2023-12-02 20:03:10,129 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 19 treesize of output 18 [2023-12-02 20:03:10,140 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 23 treesize of output 11 [2023-12-02 20:03:10,185 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 23 treesize of output 11 [2023-12-02 20:03:10,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:03:10,361 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 20:03:10,361 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-12-02 20:03:10,397 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-12-02 20:03:10,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:03:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:10,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:11,577 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 20:03:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:03:11,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-02 20:03:11,592 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 20:03:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:03:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266339916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173026465] [2023-12-02 20:03:11,649 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 20:03:11,649 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:11,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:11,659 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:11,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:12,249 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 20:03:12,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [173026465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:14,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10, 11, 10] total 35 [2023-12-02 20:03:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511016464] [2023-12-02 20:03:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 20:03:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 20:03:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 20:03:14,969 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:16,377 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-12-02 20:03:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:03:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 20:03:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:16,378 INFO L225 Difference]: With dead ends: 58 [2023-12-02 20:03:16,378 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 20:03:16,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 20:03:16,380 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:16,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 20:03:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 20:03:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-12-02 20:03:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.6) internal successors, (56), 51 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-12-02 20:03:16,386 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 16 [2023-12-02 20:03:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:16,386 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-12-02 20:03:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-12-02 20:03:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:03:16,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:16,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:16,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:03:16,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:16,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:16,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1249402032, now seen corresponding path program 1 times [2023-12-02 20:03:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633202945] [2023-12-02 20:03:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:03:16,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:16,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633202945] [2023-12-02 20:03:16,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633202945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:16,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:16,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 20:03:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659840988] [2023-12-02 20:03:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:03:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:03:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:03:16,677 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:16,777 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-02 20:03:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:03:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 20:03:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:16,778 INFO L225 Difference]: With dead ends: 65 [2023-12-02 20:03:16,778 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 20:03:16,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:03:16,779 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:16,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 140 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 20:03:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-12-02 20:03:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-02 20:03:16,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 17 [2023-12-02 20:03:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:16,785 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-02 20:03:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-02 20:03:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:03:16,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:16,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 20:03:16,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:16,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1249400778, now seen corresponding path program 1 times [2023-12-02 20:03:16,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:16,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200453194] [2023-12-02 20:03:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:16,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200453194] [2023-12-02 20:03:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200453194] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613281747] [2023-12-02 20:03:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:16,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:16,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:16,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:03:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:16,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 20:03:16,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:03:16,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:03:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613281747] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:03:16,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 6 [2023-12-02 20:03:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976482331] [2023-12-02 20:03:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:03:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:03:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:03:16,963 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:17,078 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2023-12-02 20:03:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:03:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 20:03:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:17,079 INFO L225 Difference]: With dead ends: 89 [2023-12-02 20:03:17,079 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 20:03:17,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:03:17,081 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:17,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 20:03:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2023-12-02 20:03:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.68) internal successors, (84), 65 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:03:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2023-12-02 20:03:17,088 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 17 [2023-12-02 20:03:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:17,089 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2023-12-02 20:03:17,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2023-12-02 20:03:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:03:17,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:17,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:17,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 20:03:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 20:03:17,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1249400779, now seen corresponding path program 1 times [2023-12-02 20:03:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623971576] [2023-12-02 20:03:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:03:17,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623971576] [2023-12-02 20:03:17,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623971576] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:17,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:17,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:03:17,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750926459] [2023-12-02 20:03:17,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:17,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:03:17,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:03:17,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:03:17,441 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:17,611 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2023-12-02 20:03:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:03:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 20:03:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:17,612 INFO L225 Difference]: With dead ends: 88 [2023-12-02 20:03:17,612 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 20:03:17,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:03:17,613 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:17,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 92 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 20:03:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2023-12-02 20:03:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 68 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:03:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2023-12-02 20:03:17,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 17 [2023-12-02 20:03:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:17,619 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2023-12-02 20:03:17,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2023-12-02 20:03:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:03:17,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:17,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 20:03:17,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:17,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 646537751, now seen corresponding path program 1 times [2023-12-02 20:03:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:17,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296615008] [2023-12-02 20:03:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:17,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296615008] [2023-12-02 20:03:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296615008] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245411722] [2023-12-02 20:03:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:17,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:17,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:17,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 20:03:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:17,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 20:03:17,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:17,925 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 6 treesize of output 5 [2023-12-02 20:03:17,947 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 20:03:17,976 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 20:03:17,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 20:03:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:03:17,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245411722] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:18,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65112934] [2023-12-02 20:03:18,023 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 20:03:18,023 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:18,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:18,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:18,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:18,358 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 111 for LOIs [2023-12-02 20:03:18,491 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:40,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1634#(and (or (and (exists ((|v_#memory_int_62| (Array Int (Array Int Int))) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_#memory_int_64| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_10| (Array Int (Array Int Int)))) (and (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_10| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483648)) (= (store |v_#memory_int_63| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_63| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_64| |ULTIMATE.start_create_~dll~0#1.base|) 8))) |v_#memory_int_64|) (<= (select (select |v_old(#memory_int)_AFTER_CALL_10| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483647) (= (store |v_#memory_int_62| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_62| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_63| |ULTIMATE.start_create_~dll~0#1.base|) 0))) |v_#memory_int_63|) (= |v_old(#memory_int)_AFTER_CALL_10| (store (store |v_#memory_int_64| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_int_64| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_10| |ULTIMATE.start_create_~now~0#1.base|) 16)))))) (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_75| (Array Int Int))) (and (= (store |v_#valid_75| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_75| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_81| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_84| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_create_~now~0#1.base|) 16))) |v_old(#memory_$Pointer$.base)_AFTER_CALL_10|) (= (store |v_#memory_$Pointer$.base_81| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_81| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.base_84|))) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#memory_int_69| (Array Int (Array Int Int))) (|v_#memory_int_70| (Array Int (Array Int Int))) (|v_#memory_int_71| (Array Int (Array Int Int)))) (and (= |v_#memory_int_70| (store |v_#memory_int_69| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_69| |ULTIMATE.start_create_#t~ret7#1.base|) 0 (select (select |v_#memory_int_70| |ULTIMATE.start_create_#t~ret7#1.base|) 0)))) (= (store |v_#memory_int_70| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_70| |ULTIMATE.start_create_#t~ret7#1.base|) 8 (select (select |v_#memory_int_71| |ULTIMATE.start_create_#t~ret7#1.base|) 8))) |v_#memory_int_71|) (= |#memory_int| (store |v_#memory_int_71| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_create_#t~ret7#1.base|) 16 0))))) (exists ((|v_#memory_$Pointer$.base_86| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_86| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.base_86| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#t~ret7#1.base|) 16))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_create_~dll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_77| (Array Int Int))) (= (select |v_#valid_77| |ULTIMATE.start_create_~dll~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_60| (Array Int Int))) (= |#length| (store |v_#length_60| |ULTIMATE.start_create_#t~ret7#1.base| 20))) (exists ((|v_#memory_$Pointer$.offset_86| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_86| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_86| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#t~ret7#1.base|) 16))) |#memory_$Pointer$.offset|)) (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_15| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet6#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_15| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_15| 0)))) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_84| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_81| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| |ULTIMATE.start_create_~now~0#1.base|) 16))) |v_old(#memory_$Pointer$.offset)_AFTER_CALL_10|) (= (store |v_#memory_$Pointer$.offset_81| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_81| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.offset_84|))) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|)) (and (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_75| (Array Int Int))) (and (= (store |v_#valid_75| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_75| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_81| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_81| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.base_81| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#t~ret7#1.base|) 16))))) (exists ((|v_#memory_int_66| (Array Int (Array Int Int))) (|v_#memory_int_67| (Array Int (Array Int Int))) (|v_#memory_int_68| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_9| (Array Int (Array Int Int)))) (and (= |v_#memory_int_68| (store |v_#memory_int_67| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_67| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_68| |ULTIMATE.start_create_~dll~0#1.base|) 8)))) (= |v_#memory_int_67| (store |v_#memory_int_66| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_66| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_67| |ULTIMATE.start_create_~dll~0#1.base|) 0)))) (= |v_old(#memory_int)_AFTER_CALL_9| (store (store |v_#memory_int_68| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_68| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_int_68| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_68| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_9| |ULTIMATE.start_create_~now~0#1.base|) 16)))) (<= (select (select |v_old(#memory_int)_AFTER_CALL_9| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483647) (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_9| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483648)))) (exists ((|v_#memory_$Pointer$.base_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_84| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_create_~now~0#1.base|) 16)))) (= (store |v_#memory_$Pointer$.base_85| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_85| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_84| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.base_84|))) (exists ((|v_#memory_int_62| (Array Int (Array Int Int))) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_#memory_int_64| (Array Int (Array Int Int)))) (and (= |v_#memory_int_63| (store |v_#memory_int_62| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_62| |ULTIMATE.start_create_#t~ret7#1.base|) 0 (select (select |v_#memory_int_63| |ULTIMATE.start_create_#t~ret7#1.base|) 0)))) (= |v_#memory_int_64| (store |v_#memory_int_63| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_63| |ULTIMATE.start_create_#t~ret7#1.base|) 8 (select (select |v_#memory_int_64| |ULTIMATE.start_create_#t~ret7#1.base|) 8)))) (= |#memory_int| (store |v_#memory_int_64| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_create_#t~ret7#1.base|) 16 0))))) (exists ((|v_#length_61| (Array Int Int))) (= |#length| (store |v_#length_61| |ULTIMATE.start_create_#t~ret7#1.base| 20))) (exists ((|v_#valid_76| (Array Int Int))) (= (select |v_#valid_76| |ULTIMATE.start_create_~dll~0#1.base|) 0)) (= |ULTIMATE.start_create_~dll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.offset_84| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_85| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_85| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_85| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.offset_84|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (store |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| |ULTIMATE.start_create_~now~0#1.base|) 16)))))) (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_15| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet6#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_15| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_15| 0)))) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_81| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_81| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_81| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#t~ret7#1.base|) 16))))) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret7#1.offset| 0) (= |ULTIMATE.start_create_~dll~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1)))' at error location [2023-12-02 20:03:40,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:40,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:03:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2023-12-02 20:03:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275840613] [2023-12-02 20:03:40,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:40,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 20:03:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 20:03:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=422, Unknown=7, NotChecked=42, Total=552 [2023-12-02 20:03:40,290 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 20:03:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:40,514 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2023-12-02 20:03:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:03:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-12-02 20:03:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:40,515 INFO L225 Difference]: With dead ends: 75 [2023-12-02 20:03:40,515 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 20:03:40,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=100, Invalid=497, Unknown=7, NotChecked=46, Total=650 [2023-12-02 20:03:40,516 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:40,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2023-12-02 20:03:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 20:03:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-12-02 20:03:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 68 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:03:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-12-02 20:03:40,522 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 18 [2023-12-02 20:03:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:40,522 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-12-02 20:03:40,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 20:03:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-12-02 20:03:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:03:40,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:40,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:40,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 20:03:40,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 20:03:40,724 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:03:40,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 646537752, now seen corresponding path program 1 times [2023-12-02 20:03:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:40,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156813766] [2023-12-02 20:03:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:41,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:41,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156813766] [2023-12-02 20:03:41,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156813766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:41,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348523173] [2023-12-02 20:03:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:41,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:41,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:41,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 20:03:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:41,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 20:03:41,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:41,149 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 6 treesize of output 5 [2023-12-02 20:03:41,293 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 20:03:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:03:41,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:03:41,328 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:03:41,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:03:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:03:41,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:41,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348523173] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949969841] [2023-12-02 20:03:41,467 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 20:03:41,467 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:41,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:41,468 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:41,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:41,752 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 111 for LOIs [2023-12-02 20:03:41,856 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:05,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1876#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~now~0#1.base|) 7) (= |ULTIMATE.start_create_#t~ret7#1.offset| 0) (= |ULTIMATE.start_create_~dll~0#1.offset| 0) (or (and (exists ((|v_#valid_88| (Array Int Int))) (and (= (store |v_#valid_88| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_88| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_16| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_16| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet6#1_16| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_16| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#t~ret7#1.base|) 16))))) (exists ((|v_#memory_$Pointer$.base_101| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_101| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.base_101| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#t~ret7#1.base|) 16))) |#memory_$Pointer$.base|)) (exists ((|v_#length_71| (Array Int Int))) (= (store |v_#length_71| |ULTIMATE.start_create_#t~ret7#1.base| 20) |#length|)) (exists ((|v_old(#memory_int)_AFTER_CALL_16| (Array Int (Array Int Int))) (|v_#memory_int_88| (Array Int (Array Int Int))) (|v_#memory_int_89| (Array Int (Array Int Int))) (|v_#memory_int_90| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_16| (store (store |v_#memory_int_90| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_90| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_int_90| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_90| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_16| |ULTIMATE.start_create_~now~0#1.base|) 16)))) (= |v_#memory_int_89| (store |v_#memory_int_88| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_88| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_89| |ULTIMATE.start_create_~dll~0#1.base|) 0)))) (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_16| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483648)) (= (store |v_#memory_int_89| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_89| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_90| |ULTIMATE.start_create_~dll~0#1.base|) 8))) |v_#memory_int_90|) (<= (select (select |v_old(#memory_int)_AFTER_CALL_16| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483647))) (exists ((|v_#memory_$Pointer$.offset_99| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_16| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_101| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_16| (store |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_16| |ULTIMATE.start_create_~now~0#1.base|) 16)))) (= (store |v_#memory_$Pointer$.offset_101| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_101| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.offset_99|))) (exists ((|v_#valid_86| (Array Int Int))) (= (select |v_#valid_86| |ULTIMATE.start_create_~dll~0#1.base|) 0)) (= |ULTIMATE.start_create_~dll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#memory_$Pointer$.base_96| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_99| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_16| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_16| (store |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_16| |ULTIMATE.start_create_~now~0#1.base|) 16)))) (= (store |v_#memory_$Pointer$.base_96| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_96| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.base_99|))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_#memory_int_81| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int))) (|v_#memory_int_83| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_83| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_83| |ULTIMATE.start_create_#t~ret7#1.base|) 16 0))) (= (store |v_#memory_int_82| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_82| |ULTIMATE.start_create_#t~ret7#1.base|) 8 (select (select |v_#memory_int_83| |ULTIMATE.start_create_#t~ret7#1.base|) 8))) |v_#memory_int_83|) (= (store |v_#memory_int_81| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_81| |ULTIMATE.start_create_#t~ret7#1.base|) 0 (select (select |v_#memory_int_82| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) |v_#memory_int_82|))) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|)) (and (exists ((|v_ULTIMATE.start_create_#t~nondet6#1_16| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet6#1_16| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet6#1_16| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet6#1_16| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_100| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_100| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_100| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#t~ret7#1.base|) 16))))) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#length_72| (Array Int Int))) (= |#length| (store |v_#length_72| |ULTIMATE.start_create_#t~ret7#1.base| 20))) (= |ULTIMATE.start_create_~dll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_87| (Array Int Int))) (= (select |v_#valid_87| |ULTIMATE.start_create_~dll~0#1.base|) 0)) (exists ((|v_#valid_86| (Array Int Int))) (and (= (store |v_#valid_86| |ULTIMATE.start_create_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_86| |ULTIMATE.start_create_#t~ret7#1.base|) 0))) (not (= |ULTIMATE.start_create_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_99| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_15| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_100| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_100| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_100| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.base_99|) (= (store |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_99| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_15| |ULTIMATE.start_create_~now~0#1.base|) 16))) |v_old(#memory_$Pointer$.base)_AFTER_CALL_15|))) (exists ((|v_old(#memory_int)_AFTER_CALL_15| (Array Int (Array Int Int))) (|v_#memory_int_81| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int))) (|v_#memory_int_83| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_int_83| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_83| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base| (store (select (store |v_#memory_int_83| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_83| |ULTIMATE.start_create_~dll~0#1.base|) 16 0)) |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_15| |ULTIMATE.start_create_~now~0#1.base|) 16))) |v_old(#memory_int)_AFTER_CALL_15|) (= (store |v_#memory_int_82| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_82| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_83| |ULTIMATE.start_create_~dll~0#1.base|) 8))) |v_#memory_int_83|) (= (store |v_#memory_int_81| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_81| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_82| |ULTIMATE.start_create_~dll~0#1.base|) 0))) |v_#memory_int_82|) (<= 0 (+ (select (select |v_old(#memory_int)_AFTER_CALL_15| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483648)) (<= (select (select |v_old(#memory_int)_AFTER_CALL_15| |ULTIMATE.start_create_~now~0#1.base|) 16) 2147483647))) (exists ((|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_int_86| (Array Int (Array Int Int))) (|v_#memory_int_87| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_87| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_87| |ULTIMATE.start_create_#t~ret7#1.base|) 16 0))) (= (store |v_#memory_int_86| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_86| |ULTIMATE.start_create_#t~ret7#1.base|) 8 (select (select |v_#memory_int_87| |ULTIMATE.start_create_#t~ret7#1.base|) 8))) |v_#memory_int_87|) (= |v_#memory_int_86| (store |v_#memory_int_85| |ULTIMATE.start_create_#t~ret7#1.base| (store (select |v_#memory_int_85| |ULTIMATE.start_create_#t~ret7#1.base|) 0 (select (select |v_#memory_int_86| |ULTIMATE.start_create_#t~ret7#1.base|) 0)))))) (exists ((|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_99| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_15| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_~dll~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~dll~0#1.base|) 16))) |v_#memory_$Pointer$.offset_99|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_15| (store |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_99| |ULTIMATE.start_create_~now~0#1.base|) 16 (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_15| |ULTIMATE.start_create_~now~0#1.base|) 16)))))) (exists ((|v_#memory_$Pointer$.base_96| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_96| |ULTIMATE.start_create_#t~ret7#1.base| (store (store (store (select |v_#memory_$Pointer$.base_96| |ULTIMATE.start_create_#t~ret7#1.base|) 0 0) 8 0) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#t~ret7#1.base|) 16))) |#memory_$Pointer$.base|)) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|))))' at error location [2023-12-02 20:04:05,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:05,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:04:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-12-02 20:04:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200921371] [2023-12-02 20:04:05,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 20:04:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 20:04:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=745, Unknown=6, NotChecked=56, Total=930 [2023-12-02 20:04:05,887 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:04:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:06,229 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2023-12-02 20:04:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:04:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-12-02 20:04:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:06,230 INFO L225 Difference]: With dead ends: 78 [2023-12-02 20:04:06,230 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 20:04:06,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=145, Invalid=845, Unknown=6, NotChecked=60, Total=1056 [2023-12-02 20:04:06,231 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:06,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 304 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2023-12-02 20:04:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 20:04:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2023-12-02 20:04:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 68 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2023-12-02 20:04:06,235 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 18 [2023-12-02 20:04:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:06,235 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2023-12-02 20:04:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:04:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2023-12-02 20:04:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 20:04:06,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:06,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:06,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 20:04:06,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 20:04:06,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:06,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1916663383, now seen corresponding path program 1 times [2023-12-02 20:04:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120951057] [2023-12-02 20:04:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:04:06,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120951057] [2023-12-02 20:04:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120951057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:06,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:04:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24785630] [2023-12-02 20:04:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:04:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:04:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:04:06,535 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:06,662 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2023-12-02 20:04:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:04:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 20:04:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:06,663 INFO L225 Difference]: With dead ends: 80 [2023-12-02 20:04:06,663 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 20:04:06,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:04:06,664 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:06,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 20:04:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2023-12-02 20:04:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2023-12-02 20:04:06,669 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 19 [2023-12-02 20:04:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:06,669 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2023-12-02 20:04:06,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2023-12-02 20:04:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:04:06,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:06,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 20:04:06,671 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:06,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1447396368, now seen corresponding path program 1 times [2023-12-02 20:04:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:06,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824382001] [2023-12-02 20:04:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:04:06,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824382001] [2023-12-02 20:04:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824382001] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:06,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:06,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:04:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486051494] [2023-12-02 20:04:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:04:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:04:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:04:06,794 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:06,906 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2023-12-02 20:04:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:04:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 20:04:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:06,908 INFO L225 Difference]: With dead ends: 76 [2023-12-02 20:04:06,908 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 20:04:06,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:04:06,909 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:06,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 20:04:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 20:04:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 70 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2023-12-02 20:04:06,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 20 [2023-12-02 20:04:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:06,912 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2023-12-02 20:04:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2023-12-02 20:04:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:04:06,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:06,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 20:04:06,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:06,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1447396367, now seen corresponding path program 1 times [2023-12-02 20:04:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290929661] [2023-12-02 20:04:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:04:07,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290929661] [2023-12-02 20:04:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290929661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:07,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:04:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025873626] [2023-12-02 20:04:07,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:07,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:04:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:04:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:04:07,100 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:07,234 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2023-12-02 20:04:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:04:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 20:04:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:07,235 INFO L225 Difference]: With dead ends: 75 [2023-12-02 20:04:07,235 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 20:04:07,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:04:07,236 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:07,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 20:04:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 20:04:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.5) internal successors, (84), 69 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-12-02 20:04:07,240 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 20 [2023-12-02 20:04:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:07,240 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-12-02 20:04:07,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-12-02 20:04:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:04:07,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:07,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 20:04:07,242 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:07,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash 621573974, now seen corresponding path program 1 times [2023-12-02 20:04:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:07,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445800462] [2023-12-02 20:04:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:07,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:07,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:07,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445800462] [2023-12-02 20:04:07,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445800462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:07,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:07,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-02 20:04:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003594477] [2023-12-02 20:04:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 20:04:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 20:04:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-12-02 20:04:07,575 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:07,831 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2023-12-02 20:04:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 20:04:07,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 20:04:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:07,833 INFO L225 Difference]: With dead ends: 76 [2023-12-02 20:04:07,833 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 20:04:07,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:04:07,834 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:07,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 141 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:04:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 20:04:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2023-12-02 20:04:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 69 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-12-02 20:04:07,837 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 22 [2023-12-02 20:04:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:07,838 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-12-02 20:04:07,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-12-02 20:04:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:04:07,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:07,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 20:04:07,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:07,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 621573975, now seen corresponding path program 1 times [2023-12-02 20:04:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:07,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161896494] [2023-12-02 20:04:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:08,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161896494] [2023-12-02 20:04:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161896494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261579285] [2023-12-02 20:04:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:08,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:04:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:08,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 20:04:08,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:08,428 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 20:04:08,489 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:04:08,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:04:08,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:04:08,524 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 11 treesize of output 7 [2023-12-02 20:04:08,594 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:04:08,594 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:04:08,607 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 24 treesize of output 11 [2023-12-02 20:04:08,616 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 25 treesize of output 13 [2023-12-02 20:04:08,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:04:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:08,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:04:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261579285] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:08,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:04:08,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 19 [2023-12-02 20:04:08,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460211437] [2023-12-02 20:04:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:08,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:04:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:04:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-12-02 20:04:08,643 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:08,871 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2023-12-02 20:04:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:04:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 20:04:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:08,872 INFO L225 Difference]: With dead ends: 75 [2023-12-02 20:04:08,872 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 20:04:08,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:04:08,873 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:08,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 20:04:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 20:04:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 69 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-12-02 20:04:08,877 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 22 [2023-12-02 20:04:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:08,877 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-12-02 20:04:08,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-12-02 20:04:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:04:08,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:08,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:08,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 20:04:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 20:04:09,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:09,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2023481888, now seen corresponding path program 1 times [2023-12-02 20:04:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:09,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517241205] [2023-12-02 20:04:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:09,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:04:09,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517241205] [2023-12-02 20:04:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517241205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304983559] [2023-12-02 20:04:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:09,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:09,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 20:04:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:09,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 20:04:09,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:09,373 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 13 treesize of output 9 [2023-12-02 20:04:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:04:09,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:09,448 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_24| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_24| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_24|) 0)))) is different from false [2023-12-02 20:04:09,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304983559] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:09,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013743415] [2023-12-02 20:04:09,452 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 20:04:09,452 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:09,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:09,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:09,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:09,985 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 20:04:10,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:15,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3075#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_117| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_114| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_117| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_117| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#res#1.base|) 16)))) (= (store |v_#memory_$Pointer$.offset_114| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_114| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_117| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.offset_117|))) (<= (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483647) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#length_80| (Array Int Int))) (= |#length| (store |v_#length_80| |ULTIMATE.start_create_#res#1.base| 20))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_103| (Array Int (Array Int Int))) (|v_#memory_int_101| (Array Int (Array Int Int))) (|v_#memory_int_102| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_101| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_101| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |v_#memory_int_102| |ULTIMATE.start_create_#res#1.base|) 0))) |v_#memory_int_102|) (= (store |v_#memory_int_102| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_102| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |v_#memory_int_103| |ULTIMATE.start_create_#res#1.base|) 8))) |v_#memory_int_103|) (= |#memory_int| (store |v_#memory_int_103| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_103| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16)))))) (exists ((|v_#valid_100| (Array Int Int))) (and (= (store (store |v_#valid_100| |ULTIMATE.start_create_#res#1.base| 1) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|) (= (select |v_#valid_100| |ULTIMATE.start_create_#res#1.base|) 0))) (exists ((|v_#memory_$Pointer$.base_117| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_114| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_117| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_117| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)))) (= (store |v_#memory_$Pointer$.base_114| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.base_114| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_117| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.base_117|))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_main_#res#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483648)))' at error location [2023-12-02 20:04:15,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:15,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:04:15,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2023-12-02 20:04:15,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840651926] [2023-12-02 20:04:15,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:15,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 20:04:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 20:04:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=688, Unknown=1, NotChecked=52, Total=812 [2023-12-02 20:04:15,078 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:15,296 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-12-02 20:04:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 20:04:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 20:04:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:15,297 INFO L225 Difference]: With dead ends: 87 [2023-12-02 20:04:15,297 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 20:04:15,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=85, Invalid=848, Unknown=1, NotChecked=58, Total=992 [2023-12-02 20:04:15,298 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:15,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 20:04:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-12-02 20:04:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 72 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-12-02 20:04:15,302 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 22 [2023-12-02 20:04:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:15,302 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-12-02 20:04:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-12-02 20:04:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:04:15,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:15,303 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:15,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 20:04:15,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:15,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:15,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2023483142, now seen corresponding path program 1 times [2023-12-02 20:04:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:15,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55583818] [2023-12-02 20:04:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:15,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:15,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55583818] [2023-12-02 20:04:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55583818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521982906] [2023-12-02 20:04:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:15,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:15,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:15,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 20:04:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:15,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 20:04:15,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:15,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:04:15,903 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 15 treesize of output 15 [2023-12-02 20:04:15,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:04:15,912 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 15 treesize of output 15 [2023-12-02 20:04:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:15,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:16,048 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 20:04:16,048 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 24 treesize of output 23 [2023-12-02 20:04:16,060 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 20:04:16,060 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 12 [2023-12-02 20:04:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:16,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521982906] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:16,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73309732] [2023-12-02 20:04:16,168 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 20:04:16,168 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:16,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:16,169 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:16,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:16,660 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 20:04:16,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [73309732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 12, 12] total 33 [2023-12-02 20:04:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297529025] [2023-12-02 20:04:21,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:21,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 20:04:21,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 20:04:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 20:04:21,110 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:23,245 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-12-02 20:04:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:04:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 20:04:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:23,246 INFO L225 Difference]: With dead ends: 83 [2023-12-02 20:04:23,246 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 20:04:23,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 20:04:23,247 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:23,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 20:04:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 20:04:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 20:04:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.421875) internal successors, (91), 77 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-12-02 20:04:23,251 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 22 [2023-12-02 20:04:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:23,251 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-12-02 20:04:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:04:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-12-02 20:04:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 20:04:23,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:23,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:23,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 20:04:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:23,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:23,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1318165168, now seen corresponding path program 2 times [2023-12-02 20:04:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633688360] [2023-12-02 20:04:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:23,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633688360] [2023-12-02 20:04:23,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633688360] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915938451] [2023-12-02 20:04:23,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:04:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:23,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:23,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 20:04:23,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:04:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:04:23,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 20:04:23,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:23,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:04:23,799 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 15 treesize of output 15 [2023-12-02 20:04:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:23,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:23,908 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 20:04:23,908 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 16 treesize of output 15 [2023-12-02 20:04:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915938451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:23,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333827051] [2023-12-02 20:04:23,948 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 20:04:23,948 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:23,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:23,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:23,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:24,485 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 20:04:24,509 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:30,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3763#(and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483647) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_#length_94| (Array Int Int))) (= |#length| (store |v_#length_94| |ULTIMATE.start_create_#res#1.base| 20))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_148| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_151| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_148| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_148| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_151| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.offset_151|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_151| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_151| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#res#1.base|) 16)))))) (exists ((|v_#memory_int_136| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int))) (|v_#memory_int_135| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_136| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_136| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |v_#memory_int_137| |ULTIMATE.start_create_#res#1.base|) 8))) |v_#memory_int_137|) (= (store |v_#memory_int_135| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_135| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |v_#memory_int_136| |ULTIMATE.start_create_#res#1.base|) 0))) |v_#memory_int_136|) (= |#memory_int| (store |v_#memory_int_137| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_137| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16)))))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_121| (Array Int Int))) (and (= (store (store |v_#valid_121| |ULTIMATE.start_create_#res#1.base| 1) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|) (= (select |v_#valid_121| |ULTIMATE.start_create_#res#1.base|) 0))) (exists ((|v_#memory_$Pointer$.base_151| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_148| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_151| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_151| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)))) (= (store |v_#memory_$Pointer$.base_148| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.base_148| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_151| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.base_151|))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_main_#res#1| 0) (<= (+ |ULTIMATE.start_create_#res#1.base| 1) |#StackHeapBarrier|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483648)))' at error location [2023-12-02 20:04:30,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:30,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:30,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 19 [2023-12-02 20:04:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235962752] [2023-12-02 20:04:30,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:30,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 20:04:30,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:30,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 20:04:30,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 20:04:30,116 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:30,639 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2023-12-02 20:04:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:04:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 20:04:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:30,640 INFO L225 Difference]: With dead ends: 122 [2023-12-02 20:04:30,640 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 20:04:30,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 20:04:30,642 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:30,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 315 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:04:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 20:04:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2023-12-02 20:04:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.5) internal successors, (120), 93 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2023-12-02 20:04:30,646 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 27 [2023-12-02 20:04:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:30,646 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2023-12-02 20:04:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:04:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2023-12-02 20:04:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:04:30,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:30,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:30,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 20:04:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:30,848 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:30,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash 91452393, now seen corresponding path program 1 times [2023-12-02 20:04:30,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:30,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394080186] [2023-12-02 20:04:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:04:30,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394080186] [2023-12-02 20:04:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394080186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296752638] [2023-12-02 20:04:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:30,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:30,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:30,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 20:04:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:31,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 20:04:31,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:04:31,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:31,111 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:04:31,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-12-02 20:04:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:04:31,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296752638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222439709] [2023-12-02 20:04:31,123 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:04:31,123 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:31,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:31,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:31,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:38,171 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:04:38,202 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:47,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4189#(and (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (exists ((|v_#memory_$Pointer$.base_181| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_181| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.base_25| Int) (|v_ULTIMATE.start_create_#t~mem9#1.offset_24| Int) (|v_#memory_int_172| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_181| |v_ULTIMATE.start_create_#t~mem9#1.base_25| (store (select |v_#memory_$Pointer$.offset_181| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|))))) (= |#memory_int| (store |v_#memory_int_172| |v_ULTIMATE.start_create_#t~mem9#1.base_25| (store (select |v_#memory_int_172| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select (select |#memory_int| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|))))) (<= (+ 20 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select |#length| |v_ULTIMATE.start_create_#t~mem9#1.base_25|)) (<= 0 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|)) (= (store |v_#memory_$Pointer$.base_181| |v_ULTIMATE.start_create_#t~mem9#1.base_25| (store (select |v_#memory_$Pointer$.base_181| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|)))) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_create_#t~mem9#1.base_25|) 1))) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_~node~0#1.base|) (= |ULTIMATE.start_loop_~node~0#1.offset| |ULTIMATE.start_loop_~l#1.offset|) (= |ULTIMATE.start_loop_#in~l#1.offset| |ULTIMATE.start_loop_~l#1.offset|) (or (not (= |ULTIMATE.start_loop_~node~0#1.base| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))) (not (= (select |#valid| |ULTIMATE.start_loop_~node~0#1.base|) 1)) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_53| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_53|) 1) (<= 8 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_53|)))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_loop_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|))' at error location [2023-12-02 20:04:47,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:47,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:47,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-12-02 20:04:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396172869] [2023-12-02 20:04:47,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:04:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:04:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=475, Unknown=19, NotChecked=0, Total=552 [2023-12-02 20:04:47,683 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:47,745 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2023-12-02 20:04:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:04:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 20:04:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:47,746 INFO L225 Difference]: With dead ends: 101 [2023-12-02 20:04:47,747 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 20:04:47,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=58, Invalid=475, Unknown=19, NotChecked=0, Total=552 [2023-12-02 20:04:47,747 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:47,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 20:04:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 20:04:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.4875) internal successors, (119), 93 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:04:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2023-12-02 20:04:47,751 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 28 [2023-12-02 20:04:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:47,751 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2023-12-02 20:04:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2023-12-02 20:04:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:04:47,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:47,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:47,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 20:04:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:47,953 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:04:47,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash 91452394, now seen corresponding path program 1 times [2023-12-02 20:04:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13125587] [2023-12-02 20:04:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:04:48,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13125587] [2023-12-02 20:04:48,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13125587] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682291743] [2023-12-02 20:04:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:48,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:48,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:48,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 20:04:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:48,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 20:04:48,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:04:48,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:48,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:04:48,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-12-02 20:04:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:04:48,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682291743] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:48,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140074779] [2023-12-02 20:04:48,471 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:04:48,471 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:48,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:48,472 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:48,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:55,351 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:04:55,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:05,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4582#(and (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (or (< |ULTIMATE.start_loop_~node~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_loop_~node~0#1.base|) (+ |ULTIMATE.start_loop_~node~0#1.offset| 8))) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_59| Int)) (and (<= 8 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_59|)) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_59|) 1))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_~node~0#1.base|) (= |ULTIMATE.start_loop_~node~0#1.offset| |ULTIMATE.start_loop_~l#1.offset|) (= |ULTIMATE.start_loop_#in~l#1.offset| |ULTIMATE.start_loop_~l#1.offset|) (exists ((|v_#memory_int_208| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.base_29| Int) (|v_ULTIMATE.start_create_#t~mem9#1.offset_28| Int) (|v_#memory_$Pointer$.base_213| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_213| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) 1) (<= 0 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|)) (<= (+ 20 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|) (select |#length| |v_ULTIMATE.start_create_#t~mem9#1.base_29|)) (= |#memory_int| (store |v_#memory_int_208| |v_ULTIMATE.start_create_#t~mem9#1.base_29| (store (select |v_#memory_int_208| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|) (select (select |#memory_int| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_213| |v_ULTIMATE.start_create_#t~mem9#1.base_29| (store (select |v_#memory_$Pointer$.offset_213| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|))))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_213| |v_ULTIMATE.start_create_#t~mem9#1.base_29| (store (select |v_#memory_$Pointer$.base_213| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~mem9#1.base_29|) (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_28|))))))) (or (not (= |ULTIMATE.start_loop_~node~0#1.base| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_loop_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|))' at error location [2023-12-02 20:05:05,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:05,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:05:05,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-12-02 20:05:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879927015] [2023-12-02 20:05:05,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 20:05:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 20:05:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=824, Unknown=17, NotChecked=0, Total=930 [2023-12-02 20:05:05,361 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 13 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 20:05:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:05,522 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2023-12-02 20:05:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:05:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2023-12-02 20:05:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:05,523 INFO L225 Difference]: With dead ends: 100 [2023-12-02 20:05:05,523 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 20:05:05,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=94, Invalid=881, Unknown=17, NotChecked=0, Total=992 [2023-12-02 20:05:05,524 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:05,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 170 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:05:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 20:05:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2023-12-02 20:05:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.475) internal successors, (118), 93 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:05:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2023-12-02 20:05:05,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 28 [2023-12-02 20:05:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:05,527 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2023-12-02 20:05:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 20:05:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2023-12-02 20:05:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 20:05:05,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:05,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:05:05,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 20:05:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:05,728 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:05:05,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 4427095, now seen corresponding path program 3 times [2023-12-02 20:05:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959674417] [2023-12-02 20:05:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 20:05:06,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959674417] [2023-12-02 20:05:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959674417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495116100] [2023-12-02 20:05:06,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:05:06,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:06,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:06,060 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:06,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 20:05:06,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:05:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:05:06,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 20:05:06,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:06,231 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 20:05:06,255 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 11 treesize of output 7 [2023-12-02 20:05:06,290 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 19 treesize of output 18 [2023-12-02 20:05:06,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:05:06,442 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-12-02 20:05:06,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:05:06,452 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 20:05:06,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:06,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 26 [2023-12-02 20:05:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:05:06,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:07,307 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 25 treesize of output 23 [2023-12-02 20:05:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:07,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-02 20:05:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:05:07,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495116100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:05:07,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308957365] [2023-12-02 20:05:07,360 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 20:05:07,360 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:07,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:07,360 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:07,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:05:07,823 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 20:05:07,837 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:14,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5005#(and (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483647) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_~l~0#1.base| 0)) (exists ((|v_#length_126| (Array Int Int))) (= |#length| (store |v_#length_126| |ULTIMATE.start_create_#res#1.base| 20))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_229| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_232| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_229| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_229| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.offset_232| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.offset_232|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_232| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_232| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_#res#1.base|) 16)))))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_224| (Array Int (Array Int Int))) (|v_#memory_int_225| (Array Int (Array Int Int))) (|v_#memory_int_226| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_226| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_226| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16))) |#memory_int|) (= |v_#memory_int_225| (store |v_#memory_int_224| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_224| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |v_#memory_int_225| |ULTIMATE.start_create_#res#1.base|) 0)))) (= (store |v_#memory_int_225| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_225| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |v_#memory_int_226| |ULTIMATE.start_create_#res#1.base|) 8))) |v_#memory_int_226|))) (exists ((|v_#memory_$Pointer$.base_238| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_235| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_235| |ULTIMATE.start_create_#res#1.base| (store (store (store (select |v_#memory_$Pointer$.base_235| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0) 16 (select (select |v_#memory_$Pointer$.base_238| |ULTIMATE.start_create_#res#1.base|) 16))) |v_#memory_$Pointer$.base_238|) (= (store |v_#memory_$Pointer$.base_238| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_238| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16))) |#memory_$Pointer$.base|))) (exists ((|v_#valid_154| (Array Int Int))) (and (= (select |v_#valid_154| |ULTIMATE.start_create_#res#1.base|) 0) (= |#valid| (store (store |v_#valid_154| |ULTIMATE.start_create_#res#1.base| 1) |ULTIMATE.start_main_~l~0#1.base| 0)))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_main_#res#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16) 2147483648)))' at error location [2023-12-02 20:05:14,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:14,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:05:14,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 36 [2023-12-02 20:05:14,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153090517] [2023-12-02 20:05:14,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 20:05:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 20:05:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 20:05:14,861 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 36 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 20:05:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:15,864 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-12-02 20:05:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:05:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-12-02 20:05:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:15,865 INFO L225 Difference]: With dead ends: 96 [2023-12-02 20:05:15,865 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 20:05:15,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=368, Invalid=3792, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 20:05:15,867 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:15,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 446 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:05:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 20:05:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 20:05:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 76 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:05:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2023-12-02 20:05:15,870 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 29 [2023-12-02 20:05:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:15,870 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2023-12-02 20:05:15,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 20:05:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2023-12-02 20:05:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 20:05:15,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:15,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:05:15,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 20:05:16,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:16,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:05:16,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1986449954, now seen corresponding path program 1 times [2023-12-02 20:05:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:16,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215332469] [2023-12-02 20:05:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:16,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215332469] [2023-12-02 20:05:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215332469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772770830] [2023-12-02 20:05:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:16,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:16,569 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:16,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 20:05:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:16,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 20:05:16,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:16,718 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 6 treesize of output 5 [2023-12-02 20:05:16,913 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:05:16,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 20:05:16,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:05:17,079 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:05:17,079 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 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:05:17,141 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:05:17,141 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 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:05:17,253 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 25 treesize of output 13 [2023-12-02 20:05:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:17,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:17,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:17,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-12-02 20:05:17,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:17,562 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 144 treesize of output 131 [2023-12-02 20:05:17,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:17,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2023-12-02 20:05:17,578 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 70 treesize of output 66 [2023-12-02 20:05:18,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772770830] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:18,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560431410] [2023-12-02 20:05:18,877 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:05:18,878 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:18,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:18,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:18,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:05:25,643 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:05:25,687 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:34,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5392#(and (or (not (= |ULTIMATE.start_loop_~node~0#1.base| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))) (not (= (select |#valid| |ULTIMATE.start_loop_~node~0#1.base|) 1)))' at error location [2023-12-02 20:05:34,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:34,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:05:34,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-12-02 20:05:34,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058404319] [2023-12-02 20:05:34,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 20:05:34,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 20:05:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2828, Unknown=34, NotChecked=0, Total=3080 [2023-12-02 20:05:34,649 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:05:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:35,110 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2023-12-02 20:05:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:05:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-12-02 20:05:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:35,112 INFO L225 Difference]: With dead ends: 85 [2023-12-02 20:05:35,112 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 20:05:35,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=258, Invalid=3130, Unknown=34, NotChecked=0, Total=3422 [2023-12-02 20:05:35,114 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:35,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 319 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:05:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 20:05:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-12-02 20:05:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.5625) internal successors, (100), 77 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:05:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-12-02 20:05:35,117 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 30 [2023-12-02 20:05:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:35,117 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-12-02 20:05:35,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:05:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-12-02 20:05:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 20:05:35,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:35,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:05:35,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 20:05:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:35,319 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:05:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1986449955, now seen corresponding path program 1 times [2023-12-02 20:05:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325580613] [2023-12-02 20:05:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:35,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325580613] [2023-12-02 20:05:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325580613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997775708] [2023-12-02 20:05:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:35,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:35,895 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:35,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 20:05:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:36,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 20:05:36,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:36,251 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:05:36,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:05:36,309 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 11 treesize of output 7 [2023-12-02 20:05:36,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:05:36,452 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:05:36,452 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:05:36,457 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 24 treesize of output 11 [2023-12-02 20:05:36,540 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:05:36,540 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:05:36,548 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 24 treesize of output 11 [2023-12-02 20:05:36,694 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 25 treesize of output 13 [2023-12-02 20:05:36,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:05:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:36,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:37,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:37,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-12-02 20:05:37,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:37,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-12-02 20:05:37,245 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 54 treesize of output 46 [2023-12-02 20:05:37,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:37,254 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 100 treesize of output 99 [2023-12-02 20:05:37,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2023-12-02 20:05:37,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-12-02 20:05:37,268 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 74 treesize of output 68 [2023-12-02 20:05:37,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:37,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2023-12-02 20:05:37,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:37,320 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2023-12-02 20:05:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:37,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:37,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-12-02 20:05:37,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:05:37,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 20:05:37,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 20:05:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997775708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361442515] [2023-12-02 20:05:37,516 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:05:37,516 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:37,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:37,516 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:37,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:05:44,224 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:05:44,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:53,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5753#(and (or (< |ULTIMATE.start_loop_~node~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_loop_~node~0#1.base|) (+ |ULTIMATE.start_loop_~node~0#1.offset| 8))) (or (not (= |ULTIMATE.start_loop_~node~0#1.base| 0)) (not (= |ULTIMATE.start_loop_~node~0#1.offset| 0))))' at error location [2023-12-02 20:05:53,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:53,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:05:53,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-12-02 20:05:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140574911] [2023-12-02 20:05:53,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 20:05:53,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 20:05:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2967, Unknown=27, NotChecked=0, Total=3192 [2023-12-02 20:05:53,523 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:05:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:54,427 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-12-02 20:05:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:05:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-12-02 20:05:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:54,428 INFO L225 Difference]: With dead ends: 84 [2023-12-02 20:05:54,428 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 20:05:54,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=295, Invalid=3963, Unknown=32, NotChecked=0, Total=4290 [2023-12-02 20:05:54,430 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:54,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 419 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:05:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 20:05:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-12-02 20:05:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.546875) internal successors, (99), 77 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:05:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-12-02 20:05:54,433 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 30 [2023-12-02 20:05:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:54,433 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-12-02 20:05:54,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:05:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-12-02 20:05:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 20:05:54,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:54,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:05:54,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 20:05:54,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 20:05:54,634 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:05:54,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1450408908, now seen corresponding path program 1 times [2023-12-02 20:05:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370135815] [2023-12-02 20:05:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 20:05:54,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:54,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370135815] [2023-12-02 20:05:54,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370135815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:54,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921354147] [2023-12-02 20:05:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:54,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:54,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 20:05:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:55,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 20:05:55,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:05:55,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:55,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:05:55,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-12-02 20:05:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:05:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921354147] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:05:55,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [462354631] [2023-12-02 20:05:55,252 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:05:55,252 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:55,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:55,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:55,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:06:01,964 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:06:01,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:06:10,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6150#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (or (< |ULTIMATE.start_destroy_~l#1.offset| 0) (< (select |#length| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 8))) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|))' at error location [2023-12-02 20:06:10,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:06:10,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:06:10,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-12-02 20:06:10,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952485773] [2023-12-02 20:06:10,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:06:10,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 20:06:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:06:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 20:06:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=958, Unknown=15, NotChecked=0, Total=1056 [2023-12-02 20:06:10,273 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 20:06:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:06:10,693 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-12-02 20:06:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:06:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2023-12-02 20:06:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:06:10,694 INFO L225 Difference]: With dead ends: 87 [2023-12-02 20:06:10,694 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 20:06:10,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=125, Invalid=1420, Unknown=15, NotChecked=0, Total=1560 [2023-12-02 20:06:10,695 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:06:10,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 164 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:06:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 20:06:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-12-02 20:06:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.453125) internal successors, (93), 77 states have internal predecessors, (93), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:06:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2023-12-02 20:06:10,698 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 31 [2023-12-02 20:06:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:06:10,698 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2023-12-02 20:06:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 20:06:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2023-12-02 20:06:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 20:06:10,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:10,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:06:10,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 20:06:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 20:06:10,900 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:06:10,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1712144842, now seen corresponding path program 1 times [2023-12-02 20:06:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:10,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431789470] [2023-12-02 20:06:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 20:06:11,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:06:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431789470] [2023-12-02 20:06:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431789470] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:06:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101082475] [2023-12-02 20:06:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:11,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:06:11,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:11,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:06:11,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 20:06:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:11,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 20:06:11,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:06:11,635 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 6 treesize of output 5 [2023-12-02 20:06:11,708 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:06:11,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 20:06:11,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:06:11,802 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:06:11,802 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 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:06:11,848 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:06:11,848 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 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 20:06:11,855 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 25 treesize of output 13 [2023-12-02 20:06:11,904 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 20:06:11,942 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 20:06:11,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 20:06:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2023-12-02 20:06:11,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:06:11,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101082475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:06:11,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656298800] [2023-12-02 20:06:11,994 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 20:06:11,994 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:06:11,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:06:11,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:06:11,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:06:18,567 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:06:18,598 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:06:27,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6478#(and (= |ULTIMATE.start_create_#t~ret7#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1)))' at error location [2023-12-02 20:06:27,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:06:27,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:06:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2023-12-02 20:06:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311052588] [2023-12-02 20:06:27,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:06:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 20:06:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:06:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 20:06:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1451, Unknown=22, NotChecked=78, Total=1722 [2023-12-02 20:06:27,128 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 25 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 20:06:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:06:27,456 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-12-02 20:06:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 20:06:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2023-12-02 20:06:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:06:27,457 INFO L225 Difference]: With dead ends: 81 [2023-12-02 20:06:27,457 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 20:06:27,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=183, Invalid=1521, Unknown=22, NotChecked=80, Total=1806 [2023-12-02 20:06:27,458 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:06:27,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 194 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 443 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2023-12-02 20:06:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 20:06:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 20:06:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.421875) internal successors, (91), 75 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:06:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-12-02 20:06:27,460 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 32 [2023-12-02 20:06:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:06:27,461 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-12-02 20:06:27,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 20:06:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-12-02 20:06:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 20:06:27,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:27,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:06:27,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 20:06:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 20:06:27,662 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:06:27,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1712144841, now seen corresponding path program 1 times [2023-12-02 20:06:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:27,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254508869] [2023-12-02 20:06:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:06:28,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:06:28,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254508869] [2023-12-02 20:06:28,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254508869] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:06:28,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546145837] [2023-12-02 20:06:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:28,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:06:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:28,355 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:06:28,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 20:06:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:28,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 20:06:28,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:06:28,592 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:06:28,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 20:06:28,630 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 15 treesize of output 1 [2023-12-02 20:06:28,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:06:28,745 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:06:28,745 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 1 case distinctions, treesize of input 65 treesize of output 58 [2023-12-02 20:06:28,752 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 39 treesize of output 24 [2023-12-02 20:06:28,832 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:06:28,832 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 1 case distinctions, treesize of input 65 treesize of output 58 [2023-12-02 20:06:28,839 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 39 treesize of output 24 [2023-12-02 20:06:28,854 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 40 treesize of output 24 [2023-12-02 20:06:28,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-02 20:06:28,949 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 20:06:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:28,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:06:28,986 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:06:28,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2023-12-02 20:06:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:06:29,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:06:29,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546145837] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:06:29,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015256535] [2023-12-02 20:06:29,158 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 20:06:29,158 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:06:29,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:06:29,159 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:06:29,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:06:35,744 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 20:06:35,774 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:06:43,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6790#(and (= |ULTIMATE.start_create_#t~ret7#1.offset| 0) (or (< |ULTIMATE.start_create_~now~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))))' at error location [2023-12-02 20:06:43,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:06:43,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:06:43,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 28 [2023-12-02 20:06:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315271016] [2023-12-02 20:06:43,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:06:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 20:06:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:06:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 20:06:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1860, Unknown=41, NotChecked=88, Total=2162 [2023-12-02 20:06:43,965 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 29 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 20:06:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:06:44,922 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2023-12-02 20:06:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 20:06:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-12-02 20:06:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:06:44,923 INFO L225 Difference]: With dead ends: 77 [2023-12-02 20:06:44,923 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 20:06:44,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=304, Invalid=2834, Unknown=58, NotChecked=110, Total=3306 [2023-12-02 20:06:44,924 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:06:44,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 247 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 642 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2023-12-02 20:06:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 20:06:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-02 20:06:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.359375) internal successors, (87), 71 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:06:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2023-12-02 20:06:44,927 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 32 [2023-12-02 20:06:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:06:44,928 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2023-12-02 20:06:44,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 20:06:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2023-12-02 20:06:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 20:06:44,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:44,928 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:06:44,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 20:06:45,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 20:06:45,129 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:06:45,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2012972571, now seen corresponding path program 2 times [2023-12-02 20:06:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154404364] [2023-12-02 20:06:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:06:46,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:06:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154404364] [2023-12-02 20:06:46,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154404364] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:06:46,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909830139] [2023-12-02 20:06:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:06:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:06:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:46,260 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:06:46,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 20:06:46,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:06:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:06:46,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 104 conjunts are in the unsatisfiable core [2023-12-02 20:06:46,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:06:46,703 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 20:06:46,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 20:06:46,900 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 11 treesize of output 7 [2023-12-02 20:06:46,907 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 11 treesize of output 7 [2023-12-02 20:06:46,914 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 19 treesize of output 18 [2023-12-02 20:06:46,922 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 23 treesize of output 11 [2023-12-02 20:06:46,971 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 23 treesize of output 11 [2023-12-02 20:06:46,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:06:47,051 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:06:47,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:06:47,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-12-02 20:06:47,150 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 23 treesize of output 22 [2023-12-02 20:06:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,327 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-02 20:06:47,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 68 [2023-12-02 20:06:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-12-02 20:06:47,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,627 INFO L349 Elim1Store]: treesize reduction 63, result has 19.2 percent of original size [2023-12-02 20:06:47,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 158 treesize of output 119 [2023-12-02 20:06:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:47,657 INFO L349 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2023-12-02 20:06:47,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 92 [2023-12-02 20:06:48,194 INFO L349 Elim1Store]: treesize reduction 32, result has 71.7 percent of original size [2023-12-02 20:06:48,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 132 treesize of output 176 [2023-12-02 20:06:48,265 INFO L349 Elim1Store]: treesize reduction 24, result has 73.0 percent of original size [2023-12-02 20:06:48,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 172 treesize of output 166 [2023-12-02 20:06:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:06:49,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:06:49,425 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base|)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base|)) (.cse1 (+ 16 |c_ULTIMATE.start_create_#t~mem9#1.offset|))) (and (forall ((v_ArrVal_2210 (Array Int Int))) (or (not (= v_ArrVal_2210 (store .cse0 .cse1 (select v_ArrVal_2210 .cse1)))) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_2210))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse3 .cse1 v_ArrVal_2211)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|))))) (forall ((v_ArrVal_2210 (Array Int Int))) (or (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse3 .cse1 v_ArrVal_2211)))) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (< (select (select .cse4 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) (= (select (select .cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_2210) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0)))) (not (= v_ArrVal_2210 (store .cse0 .cse1 (select v_ArrVal_2210 .cse1)))))))) is different from false [2023-12-02 20:06:49,478 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (let ((.cse4 (select |c_#memory_$Pointer$.offset| .cse3)) (.cse0 (select |c_#memory_$Pointer$.base| .cse3)) (.cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse1 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2210 .cse1)) v_ArrVal_2210)) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.offset| .cse3 (store .cse4 .cse1 v_ArrVal_2211)))) (or (< (select (select .cse2 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (select .cse2 (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_2210) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0))))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| .cse5))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse6 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (or (< (select (select (store |c_#memory_$Pointer$.offset| .cse3 (store .cse4 .cse6 v_ArrVal_2211)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_2210))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0))) (not (= (store .cse0 .cse6 (select v_ArrVal_2210 .cse6)) v_ArrVal_2210))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| .cse5)))))) is different from false [2023-12-02 20:06:49,548 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse10 (+ |c_ULTIMATE.start_create_#t~mem8#1.offset| 8))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base|) .cse10 |c_ULTIMATE.start_create_~now~0#1.base|)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base|) .cse10 |c_ULTIMATE.start_create_~now~0#1.offset|))) (.cse4 (select (select .cse3 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (let ((.cse6 (select .cse5 .cse4)) (.cse0 (select .cse3 .cse4)) (.cse7 (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse1 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2210 .cse1)) v_ArrVal_2210)) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (let ((.cse2 (store .cse5 .cse4 (store .cse6 .cse1 v_ArrVal_2211)))) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (select .cse2 (select (select (store .cse3 .cse4 v_ArrVal_2210) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< (select (select .cse2 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|))))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| .cse7))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse9 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (let ((.cse8 (store .cse3 .cse4 v_ArrVal_2210))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< (select (select (store .cse5 .cse4 (store .cse6 .cse9 v_ArrVal_2211)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|))) (not (= (store .cse0 .cse9 (select v_ArrVal_2210 .cse9)) v_ArrVal_2210))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| .cse7)))))))) is different from false [2023-12-02 20:06:49,649 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (let ((.cse7 (select |c_#memory_$Pointer$.base| .cse6)) (.cse9 (select |c_#memory_$Pointer$.offset| .cse6)) (.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem8#1.offset_53| Int)) (or (< |v_ULTIMATE.start_create_#t~mem8#1.offset_53| .cse0) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (let ((.cse8 (+ 8 |v_ULTIMATE.start_create_#t~mem8#1.offset_53|))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| .cse6 (store .cse9 .cse8 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse6 (store .cse7 .cse8 |c_ULTIMATE.start_create_~now~0#1.base|)))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse3 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (not (= (store (select .cse1 .cse2) .cse3 (select v_ArrVal_2210 .cse3)) v_ArrVal_2210)) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (let ((.cse4 (store .cse1 .cse2 v_ArrVal_2210))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< (select (select (store .cse5 .cse2 (store (select .cse5 .cse2) .cse3 v_ArrVal_2211)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|))))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))))))) (forall ((|v_ULTIMATE.start_create_#t~mem8#1.offset_53| Int)) (or (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (let ((.cse15 (+ 8 |v_ULTIMATE.start_create_#t~mem8#1.offset_53|))) (let ((.cse13 (store |c_#memory_$Pointer$.offset| .cse6 (store .cse9 .cse15 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse11 (store |c_#memory_$Pointer$.base| .cse6 (store .cse7 .cse15 |c_ULTIMATE.start_create_~now~0#1.base|)))) (let ((.cse12 (select (select .cse11 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse14 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (let ((.cse10 (store .cse13 .cse12 (store (select .cse13 .cse12) .cse14 v_ArrVal_2211)))) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (= (select (select .cse10 (select (select (store .cse11 .cse12 v_ArrVal_2210) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< (select (select .cse10 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|)))) (not (= (store (select .cse11 .cse12) .cse14 (select v_ArrVal_2210 .cse14)) v_ArrVal_2210)))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| (select (select .cse13 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))))) (< |v_ULTIMATE.start_create_#t~mem8#1.offset_53| .cse0)))))) is different from false [2023-12-02 20:06:49,783 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_#t~ret7#1.offset|))) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_#t~ret7#1.base|)))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_create_#t~ret7#1.base|)) (.cse9 (select .cse8 |c_ULTIMATE.start_create_#t~ret7#1.base|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem8#1.offset_53| Int)) (or (< |v_ULTIMATE.start_create_#t~mem8#1.offset_53| |c_ULTIMATE.start_create_#t~ret7#1.offset|) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (let ((.cse7 (+ 8 |v_ULTIMATE.start_create_#t~mem8#1.offset_53|))) (let ((.cse0 (store .cse8 |c_ULTIMATE.start_create_#t~ret7#1.base| (store .cse9 .cse7 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (or (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse1 (store .cse5 |c_ULTIMATE.start_create_#t~ret7#1.base| (store .cse6 .cse7 |c_ULTIMATE.start_create_~now~0#1.base|)))) (let ((.cse3 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|)) (.cse2 (select (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (or (not (= (store (select .cse1 .cse2) .cse3 (select v_ArrVal_2210 .cse3)) v_ArrVal_2210)) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (or (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (< (select (select (store .cse0 .cse2 (store (select .cse0 .cse2) .cse3 v_ArrVal_2211)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) (= (select (let ((.cse4 (store .cse1 .cse2 v_ArrVal_2210))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0))))))))))))) (forall ((|v_ULTIMATE.start_create_#t~mem8#1.offset_53| Int)) (or (< |v_ULTIMATE.start_create_#t~mem8#1.offset_53| |c_ULTIMATE.start_create_#t~ret7#1.offset|) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_48| Int)) (let ((.cse15 (+ 8 |v_ULTIMATE.start_create_#t~mem8#1.offset_53|))) (let ((.cse14 (store .cse8 |c_ULTIMATE.start_create_#t~ret7#1.base| (store .cse9 .cse15 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (or (forall ((v_ArrVal_2210 (Array Int Int))) (let ((.cse10 (store .cse5 |c_ULTIMATE.start_create_#t~ret7#1.base| (store .cse6 .cse15 |c_ULTIMATE.start_create_~now~0#1.base|)))) (let ((.cse11 (select (select .cse10 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse12 (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_48|))) (or (not (= (store (select .cse10 .cse11) .cse12 (select v_ArrVal_2210 .cse12)) v_ArrVal_2210)) (forall ((v_ArrVal_2211 Int) (|v_ULTIMATE.start_loop_~node~0#1.offset_68| Int)) (let ((.cse13 (store .cse14 .cse11 (store (select .cse14 .cse11) .cse12 v_ArrVal_2211)))) (or (= (select (select .cse13 (select (select (store .cse10 .cse11 v_ArrVal_2210) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) |v_ULTIMATE.start_loop_~node~0#1.offset_68|) 0) (< |v_ULTIMATE.start_loop_~node~0#1.offset_68| 0) (< (select (select .cse13 |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) |v_ULTIMATE.start_loop_~node~0#1.offset_68|)))))))) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_48| (select (select .cse14 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))))))))) is different from false [2023-12-02 20:06:52,347 INFO L349 Elim1Store]: treesize reduction 317, result has 32.8 percent of original size [2023-12-02 20:06:52,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 37 case distinctions, treesize of input 122364 treesize of output 67594 [2023-12-02 20:06:59,455 INFO L349 Elim1Store]: treesize reduction 364, result has 32.3 percent of original size [2023-12-02 20:06:59,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 33520 treesize of output 25065 [2023-12-02 20:07:02,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:07:02,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 35506 treesize of output 26412 [2023-12-02 20:07:06,660 INFO L349 Elim1Store]: treesize reduction 571, result has 32.5 percent of original size [2023-12-02 20:07:06,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 109678 treesize of output 78064 [2023-12-02 20:07:10,373 INFO L224 Elim1Store]: Index analysis took 121 ms [2023-12-02 20:07:11,727 INFO L349 Elim1Store]: treesize reduction 634, result has 29.4 percent of original size [2023-12-02 20:07:11,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 37622 treesize of output 36263 [2023-12-02 20:07:12,869 INFO L224 Elim1Store]: Index analysis took 132 ms [2023-12-02 20:07:15,114 INFO L349 Elim1Store]: treesize reduction 10, result has 98.2 percent of original size [2023-12-02 20:07:15,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 36039 treesize of output 35841 [2023-12-02 20:11:46,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 20:11:46,977 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 20:11:46,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 20:11:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679641347] [2023-12-02 20:11:46,979 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:11:46,979 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:11:46,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:11:46,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:11:46,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:11:46,984 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 20:11:46,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:11:46,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-02 20:11:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142453107] [2023-12-02 20:11:46,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 20:11:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 20:11:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1224, Unknown=5, NotChecked=370, Total=1722 [2023-12-02 20:11:46,987 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:46,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1224, Unknown=5, NotChecked=370, Total=1722 [2023-12-02 20:11:46,989 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:46,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:11:46,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 20:11:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:47,190 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 20:11:47,192 INFO L158 Benchmark]: Toolchain (without parser) took 520851.78ms. Allocated memory was 205.5MB in the beginning and 520.1MB in the end (delta: 314.6MB). Free memory was 170.8MB in the beginning and 182.8MB in the end (delta: -11.9MB). Peak memory consumption was 306.9MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,192 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 121.6MB. Free memory is still 69.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:11:47,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.31ms. Allocated memory is still 205.5MB. Free memory was 170.8MB in the beginning and 151.0MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,192 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.01ms. Allocated memory is still 205.5MB. Free memory was 150.1MB in the beginning and 148.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,192 INFO L158 Benchmark]: Boogie Preprocessor took 30.53ms. Allocated memory is still 205.5MB. Free memory was 148.9MB in the beginning and 146.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,193 INFO L158 Benchmark]: RCFGBuilder took 466.76ms. Allocated memory is still 205.5MB. Free memory was 146.8MB in the beginning and 125.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,193 INFO L158 Benchmark]: TraceAbstraction took 519875.30ms. Allocated memory was 205.5MB in the beginning and 520.1MB in the end (delta: 314.6MB). Free memory was 124.9MB in the beginning and 182.8MB in the end (delta: -57.8MB). Peak memory consumption was 260.7MB. Max. memory is 16.1GB. [2023-12-02 20:11:47,194 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 121.6MB. Free memory is still 69.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.31ms. Allocated memory is still 205.5MB. Free memory was 170.8MB in the beginning and 151.0MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.01ms. Allocated memory is still 205.5MB. Free memory was 150.1MB in the beginning and 148.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.53ms. Allocated memory is still 205.5MB. Free memory was 148.9MB in the beginning and 146.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 466.76ms. Allocated memory is still 205.5MB. Free memory was 146.8MB in the beginning and 125.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 519875.30ms. Allocated memory was 205.5MB in the beginning and 520.1MB in the end (delta: 314.6MB). Free memory was 124.9MB in the beginning and 182.8MB in the end (delta: -57.8MB). Peak memory consumption was 260.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-fst-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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 0c43b1e86d53f0a623ddcdf970bae6b5fd24ed69ec4a9688050aa705dc6cf897 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:11:48,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:11:48,904 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-12-02 20:11:48,909 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:11:48,910 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:11:48,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:11:48,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:11:48,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:11:48,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:11:48,937 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:11:48,938 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:11:48,938 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:11:48,939 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:11:48,939 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:11:48,940 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:11:48,940 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:11:48,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:11:48,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:11:48,942 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:11:48,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:11:48,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:11:48,944 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:11:48,944 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:11:48,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 20:11:48,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:11:48,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:11:48,945 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 20:11:48,946 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 20:11:48,946 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:11:48,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:11:48,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:11:48,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 20:11:48,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:11:48,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:11:48,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:48,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:11:48,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:11:48,949 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 20:11:48,949 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:48,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:11:48,950 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:11:48,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:11:48,950 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_8891cc07-65bf-485f-b643-a6fa3e64bc5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c43b1e86d53f0a623ddcdf970bae6b5fd24ed69ec4a9688050aa705dc6cf897 [2023-12-02 20:11:49,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:11:49,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:11:49,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:11:49,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:11:49,272 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:11:49,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/dll-fst-data.i [2023-12-02 20:11:51,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:11:52,277 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:11:52,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/sv-benchmarks/c/memsafety-broom/dll-fst-data.i [2023-12-02 20:11:52,305 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/c4a4e4821/c5735925c29842de82c47596278576cc/FLAGdd0e3cb8e [2023-12-02 20:11:52,320 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/data/c4a4e4821/c5735925c29842de82c47596278576cc [2023-12-02 20:11:52,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:11:52,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:11:52,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:52,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:11:52,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:11:52,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6494a6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52, skipping insertion in model container [2023-12-02 20:11:52,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,423 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:11:52,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:52,703 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:11:52,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:52,777 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:11:52,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52 WrapperNode [2023-12-02 20:11:52,778 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:52,779 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:52,779 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:11:52,779 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:11:52,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,825 INFO L138 Inliner]: procedures = 122, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 67 [2023-12-02 20:11:52,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:52,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:11:52,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:11:52,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:11:52,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:11:52,863 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:11:52,863 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:11:52,863 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:11:52,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (1/1) ... [2023-12-02 20:11:52,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:52,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:11:52,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:11:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 20:11:52,932 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 20:11:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:11:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:11:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:11:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:11:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 20:11:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:11:52,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:11:53,063 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:11:53,065 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:11:53,534 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:11:53,575 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:11:53,575 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 20:11:53,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:53 BoogieIcfgContainer [2023-12-02 20:11:53,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:11:53,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:11:53,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:11:53,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:11:53,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:11:52" (1/3) ... [2023-12-02 20:11:53,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fb7b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:53, skipping insertion in model container [2023-12-02 20:11:53,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:52" (2/3) ... [2023-12-02 20:11:53,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fb7b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:53, skipping insertion in model container [2023-12-02 20:11:53,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:53" (3/3) ... [2023-12-02 20:11:53,584 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-fst-data.i [2023-12-02 20:11:53,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:11:53,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 20:11:53,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:11:53,641 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;@73747cf0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:11:53,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-12-02 20:11:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 20:11:53,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:53,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 20:11:53,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 4452315, now seen corresponding path program 1 times [2023-12-02 20:11:53,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:53,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251820378] [2023-12-02 20:11:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:53,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:53,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:53,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 20:11:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:53,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:11:53,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:53,843 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 6 treesize of output 7 [2023-12-02 20:11:53,854 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 20:11:53,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:53,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251820378] [2023-12-02 20:11:53,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251820378] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:53,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071662763] [2023-12-02 20:11:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:53,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:53,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:53,893 INFO L87 Difference]: Start difference. First operand has 58 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:54,130 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-12-02 20:11:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 20:11:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:54,138 INFO L225 Difference]: With dead ends: 55 [2023-12-02 20:11:54,138 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 20:11:54,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 20:11:54,143 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:54,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 20:11:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 20:11:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-12-02 20:11:54,175 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 4 [2023-12-02 20:11:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:54,175 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-12-02 20:11:54,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-12-02 20:11:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 20:11:54,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:54,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 20:11:54,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:54,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:54,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 4452316, now seen corresponding path program 1 times [2023-12-02 20:11:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99033635] [2023-12-02 20:11:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:54,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:54,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 20:11:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:54,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 20:11:54,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:54,446 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 6 treesize of output 5 [2023-12-02 20:11:54,460 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 20:11:54,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:54,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99033635] [2023-12-02 20:11:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99033635] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:54,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989370097] [2023-12-02 20:11:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:54,465 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:54,751 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-12-02 20:11:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 20:11:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:54,753 INFO L225 Difference]: With dead ends: 51 [2023-12-02 20:11:54,753 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 20:11:54,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 20:11:54,755 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:54,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 67 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:11:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 20:11:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 20:11:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-12-02 20:11:54,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 4 [2023-12-02 20:11:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:54,764 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-12-02 20:11:54,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-12-02 20:11:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:11:54,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:54,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:54,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 20:11:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:54,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:54,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -62470296, now seen corresponding path program 1 times [2023-12-02 20:11:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:54,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985201587] [2023-12-02 20:11:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:54,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:54,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 20:11:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:55,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 20:11:55,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:55,058 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 6 treesize of output 7 [2023-12-02 20:11:55,113 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 20:11:55,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:55,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985201587] [2023-12-02 20:11:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985201587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:55,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:55,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:11:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86557273] [2023-12-02 20:11:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:55,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:55,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:55,118 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:55,509 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-12-02 20:11:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 20:11:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:55,513 INFO L225 Difference]: With dead ends: 51 [2023-12-02 20:11:55,513 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 20:11:55,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:55,515 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:55,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 97 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:11:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 20:11:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-12-02 20:11:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-02 20:11:55,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 9 [2023-12-02 20:11:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:55,524 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-02 20:11:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-02 20:11:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:11:55,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:55,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:55,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:55,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:55,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:55,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash -62470295, now seen corresponding path program 1 times [2023-12-02 20:11:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405351554] [2023-12-02 20:11:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:55,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:55,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 20:11:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:55,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 20:11:55,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:55,811 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 6 treesize of output 5 [2023-12-02 20:11:55,920 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 20:11:55,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:55,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:55,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405351554] [2023-12-02 20:11:55,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405351554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:55,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:55,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:11:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107699126] [2023-12-02 20:11:55,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:55,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:55,923 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:56,399 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-12-02 20:11:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 20:11:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:56,401 INFO L225 Difference]: With dead ends: 50 [2023-12-02 20:11:56,401 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 20:11:56,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:56,402 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:56,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:11:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 20:11:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-12-02 20:11:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-12-02 20:11:56,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 9 [2023-12-02 20:11:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:56,409 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-12-02 20:11:56,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-12-02 20:11:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:11:56,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:56,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:56,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:56,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:56,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1175375798, now seen corresponding path program 1 times [2023-12-02 20:11:56,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:56,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259229734] [2023-12-02 20:11:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:56,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:56,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:56,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 20:11:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:56,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:11:56,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:56,697 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 6 treesize of output 7 [2023-12-02 20:11:56,774 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 20:11:56,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:56,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259229734] [2023-12-02 20:11:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259229734] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:11:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924494180] [2023-12-02 20:11:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:11:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:11:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:56,777 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:57,149 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-12-02 20:11:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:11:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 20:11:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:57,151 INFO L225 Difference]: With dead ends: 54 [2023-12-02 20:11:57,151 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 20:11:57,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:57,152 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:57,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:11:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 20:11:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2023-12-02 20:11:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-12-02 20:11:57,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 14 [2023-12-02 20:11:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:57,160 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-12-02 20:11:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-12-02 20:11:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:11:57,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:57,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:57,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 20:11:57,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:57,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1175375797, now seen corresponding path program 1 times [2023-12-02 20:11:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438956764] [2023-12-02 20:11:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:57,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:57,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:57,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 20:11:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:57,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 20:11:57,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:57,454 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 6 treesize of output 5 [2023-12-02 20:11:57,610 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 20:11:57,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:57,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:57,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438956764] [2023-12-02 20:11:57,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438956764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:57,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:57,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:11:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826449265] [2023-12-02 20:11:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:57,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:11:57,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:11:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:57,612 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:58,113 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-12-02 20:11:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:11:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 20:11:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:58,115 INFO L225 Difference]: With dead ends: 53 [2023-12-02 20:11:58,115 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 20:11:58,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:58,116 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:58,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:11:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 20:11:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-12-02 20:11:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 47 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-12-02 20:11:58,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 14 [2023-12-02 20:11:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:58,122 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-12-02 20:11:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-12-02 20:11:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 20:11:58,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:58,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:58,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 20:11:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:58,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:58,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash 38567467, now seen corresponding path program 1 times [2023-12-02 20:11:58,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:58,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390443605] [2023-12-02 20:11:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:58,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:58,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:58,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 20:11:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:11:58,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:58,488 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 20:11:58,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:58,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390443605] [2023-12-02 20:11:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390443605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:11:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756044396] [2023-12-02 20:11:58,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:11:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:11:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:58,491 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:58,798 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2023-12-02 20:11:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:11:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 20:11:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:58,800 INFO L225 Difference]: With dead ends: 55 [2023-12-02 20:11:58,800 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 20:11:58,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:58,801 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:58,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:11:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 20:11:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2023-12-02 20:11:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.625) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-12-02 20:11:58,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2023-12-02 20:11:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:58,807 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-12-02 20:11:58,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-12-02 20:11:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 20:11:58,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:58,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:58,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 20:11:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:59,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:11:59,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash 40303171, now seen corresponding path program 1 times [2023-12-02 20:11:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378128346] [2023-12-02 20:11:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:59,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:59,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:59,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:59,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 20:11:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:59,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 20:11:59,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:59,134 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 11 treesize of output 7 [2023-12-02 20:11:59,143 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 11 treesize of output 7 [2023-12-02 20:11:59,177 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 23 treesize of output 11 [2023-12-02 20:11:59,188 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 19 treesize of output 18 [2023-12-02 20:11:59,238 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 23 treesize of output 11 [2023-12-02 20:11:59,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:11:59,421 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 23 treesize of output 11 [2023-12-02 20:11:59,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:11:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:59,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:59,892 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv16 64)))) (and (forall ((v_ArrVal_167 (Array (_ BitVec 64) (_ BitVec 64)))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_167) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) (_ bv0 64)) (not (= v_ArrVal_167 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_167 .cse0)))))) (forall ((v_ArrVal_166 (Array (_ BitVec 64) (_ BitVec 64)))) (or (not (= v_ArrVal_166 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_166 .cse0)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_166) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))))) is different from false [2023-12-02 20:12:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:02,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378128346] [2023-12-02 20:12:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378128346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:02,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770528164] [2023-12-02 20:12:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:02,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:02,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 20:12:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:02,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 20:12:02,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:02,939 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 11 treesize of output 7 [2023-12-02 20:12:02,948 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 11 treesize of output 7 [2023-12-02 20:12:02,961 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 23 treesize of output 11 [2023-12-02 20:12:02,969 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 19 treesize of output 18 [2023-12-02 20:12:03,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:03,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:12:03,016 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 23 treesize of output 11 [2023-12-02 20:12:03,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:03,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 20:12:03,095 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 23 treesize of output 11 [2023-12-02 20:12:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:03,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:03,332 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv16 64)))) (and (forall ((v_ArrVal_223 (Array (_ BitVec 64) (_ BitVec 64)))) (or (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_223 .cse0)) v_ArrVal_223)) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) (forall ((v_ArrVal_222 (Array (_ BitVec 64) (_ BitVec 64)))) (or (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_222 .cse0)) v_ArrVal_222)))))) is different from false [2023-12-02 20:12:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [770528164] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59943708] [2023-12-02 20:12:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:06,285 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 20:12:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:06,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 20:12:06,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:06,397 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 11 treesize of output 7 [2023-12-02 20:12:06,403 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 11 treesize of output 7 [2023-12-02 20:12:06,413 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 20:12:06,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 20:12:06,521 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 20:12:06,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-12-02 20:12:06,860 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 20:12:06,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-12-02 20:12:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:07,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:07,254 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv16 64)))) (and (forall ((v_ArrVal_279 (Array (_ BitVec 64) (_ BitVec 64)))) (or (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_279) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_279 .cse0)) v_ArrVal_279)))) (forall ((v_ArrVal_278 (Array (_ BitVec 64) (_ BitVec 64)))) (or (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_278) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (not (= v_ArrVal_278 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_278 .cse0)))))))) is different from false [2023-12-02 20:12:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59943708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:09,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 10, 9] total 25 [2023-12-02 20:12:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884395689] [2023-12-02 20:12:09,939 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 20:12:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 20:12:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=399, Unknown=3, NotChecked=126, Total=600 [2023-12-02 20:12:09,941 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 20:12:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:10,729 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-12-02 20:12:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:12:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2023-12-02 20:12:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:10,731 INFO L225 Difference]: With dead ends: 54 [2023-12-02 20:12:10,731 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 20:12:10,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=433, Unknown=3, NotChecked=132, Total=650 [2023-12-02 20:12:10,732 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:10,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 393 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 96 Unchecked, 0.7s Time] [2023-12-02 20:12:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 20:12:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-12-02 20:12:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.606060606060606) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-02 20:12:10,737 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 16 [2023-12-02 20:12:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:10,738 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-02 20:12:10,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 20:12:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-02 20:12:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:12:10,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:10,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:10,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-02 20:12:10,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2023-12-02 20:12:11,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 20:12:11,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:11,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:11,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash 646537751, now seen corresponding path program 1 times [2023-12-02 20:12:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:11,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499147931] [2023-12-02 20:12:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:11,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:11,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:11,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 20:12:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:11,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:12:11,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:11,471 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 6 treesize of output 7 [2023-12-02 20:12:11,529 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_~pi~0.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 20:12:11,558 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 20:12:11,558 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 20:12:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:12:11,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:11,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499147931] [2023-12-02 20:12:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499147931] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1788309809] [2023-12-02 20:12:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:11,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:11,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:11,750 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:11,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 20:12:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:11,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:12:11,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:11,961 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 6 treesize of output 7 [2023-12-02 20:12:12,008 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 20:12:12,008 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 20:12:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:12:12,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1788309809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778148671] [2023-12-02 20:12:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:12,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:12,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:12,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:12,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 20:12:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:12,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:12:12,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:12,421 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 20:12:12,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 20:12:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:12,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:12,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778148671] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:12,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:12,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2023-12-02 20:12:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369080788] [2023-12-02 20:12:12,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:12,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:12:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:12:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2023-12-02 20:12:12,607 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 20:12:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:13,293 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-12-02 20:12:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:12:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-12-02 20:12:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:13,295 INFO L225 Difference]: With dead ends: 56 [2023-12-02 20:12:13,295 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 20:12:13,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=82, Unknown=1, NotChecked=18, Total=132 [2023-12-02 20:12:13,296 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:13,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 139 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 1 Unknown, 53 Unchecked, 0.6s Time] [2023-12-02 20:12:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 20:12:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-12-02 20:12:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-12-02 20:12:13,300 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 18 [2023-12-02 20:12:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:13,301 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-12-02 20:12:13,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 20:12:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-12-02 20:12:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:12:13,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:13,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:13,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 20:12:13,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 20:12:13,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-12-02 20:12:13,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:13,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:13,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash 646537752, now seen corresponding path program 1 times [2023-12-02 20:12:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:13,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040943246] [2023-12-02 20:12:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:13,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:13,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:13,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:13,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 20:12:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:14,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 20:12:14,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:14,064 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 6 treesize of output 7 [2023-12-02 20:12:14,069 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 6 treesize of output 5 [2023-12-02 20:12:14,238 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) (_ bv0 1)) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 20:12:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:12:14,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-12-02 20:12:14,292 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:14,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:12:14,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:14,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040943246] [2023-12-02 20:12:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040943246] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413983488] [2023-12-02 20:12:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:14,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:14,703 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:14,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 20:12:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:14,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 20:12:14,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:14,974 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 6 treesize of output 5 [2023-12-02 20:12:14,981 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 6 treesize of output 7 [2023-12-02 20:12:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:12:15,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-12-02 20:12:15,138 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:15,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:12:15,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413983488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355763388] [2023-12-02 20:12:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:17,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:17,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 20:12:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:17,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 20:12:17,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:17,594 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 6 treesize of output 5 [2023-12-02 20:12:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:12:17,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-12-02 20:12:17,791 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:17,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:12:17,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355763388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:18,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:12:18,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 9 [2023-12-02 20:12:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711899897] [2023-12-02 20:12:18,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:18,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:12:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:12:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-12-02 20:12:18,055 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:18,912 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-12-02 20:12:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:12:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-02 20:12:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:18,913 INFO L225 Difference]: With dead ends: 64 [2023-12-02 20:12:18,913 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 20:12:18,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2023-12-02 20:12:18,914 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:18,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2023-12-02 20:12:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 20:12:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2023-12-02 20:12:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-12-02 20:12:18,919 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 18 [2023-12-02 20:12:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:18,920 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-12-02 20:12:18,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-12-02 20:12:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:12:18,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:18,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:18,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 20:12:19,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 20:12:19,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 20:12:19,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:19,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:19,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash 74952164, now seen corresponding path program 1 times [2023-12-02 20:12:19,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:19,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81468637] [2023-12-02 20:12:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:19,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:19,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:19,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 20:12:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:19,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:12:19,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:19,639 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 6 treesize of output 7 [2023-12-02 20:12:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:19,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:19,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81468637] [2023-12-02 20:12:19,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81468637] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:19,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:12:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040631667] [2023-12-02 20:12:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:12:19,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:12:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:12:19,710 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:20,204 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2023-12-02 20:12:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:12:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 20:12:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:20,205 INFO L225 Difference]: With dead ends: 71 [2023-12-02 20:12:20,205 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 20:12:20,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:12:20,206 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:20,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 115 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:12:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 20:12:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2023-12-02 20:12:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-12-02 20:12:20,210 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 18 [2023-12-02 20:12:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:20,210 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-12-02 20:12:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-12-02 20:12:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:12:20,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:20,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:20,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 20:12:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:20,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:20,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash 74952165, now seen corresponding path program 1 times [2023-12-02 20:12:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:20,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26384953] [2023-12-02 20:12:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:20,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:20,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 20:12:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:20,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 20:12:20,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:20,526 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 6 treesize of output 5 [2023-12-02 20:12:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:20,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:20,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:20,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26384953] [2023-12-02 20:12:20,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26384953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:20,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:20,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:12:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096192457] [2023-12-02 20:12:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:12:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:12:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:12:20,694 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:21,376 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2023-12-02 20:12:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:12:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 20:12:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:21,378 INFO L225 Difference]: With dead ends: 79 [2023-12-02 20:12:21,378 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 20:12:21,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:12:21,379 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:21,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 106 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 20:12:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 20:12:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2023-12-02 20:12:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.558139534883721) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-12-02 20:12:21,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 18 [2023-12-02 20:12:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:21,384 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-12-02 20:12:21,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-12-02 20:12:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 20:12:21,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:21,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:21,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 20:12:21,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:21,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:21,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1971451658, now seen corresponding path program 1 times [2023-12-02 20:12:21,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:21,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432951851] [2023-12-02 20:12:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:21,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:21,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:21,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 20:12:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:21,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:12:21,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:21,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:21,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432951851] [2023-12-02 20:12:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432951851] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:21,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:21,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 20:12:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152346870] [2023-12-02 20:12:21,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:21,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:12:21,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:12:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:12:21,753 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:22,136 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-12-02 20:12:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:12:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 20:12:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:22,137 INFO L225 Difference]: With dead ends: 72 [2023-12-02 20:12:22,137 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 20:12:22,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:12:22,138 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:22,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:12:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 20:12:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2023-12-02 20:12:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 59 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2023-12-02 20:12:22,143 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 19 [2023-12-02 20:12:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:22,143 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2023-12-02 20:12:22,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2023-12-02 20:12:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:12:22,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:22,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:22,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-12-02 20:12:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:22,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:22,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1447396368, now seen corresponding path program 1 times [2023-12-02 20:12:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121197549] [2023-12-02 20:12:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:22,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:22,347 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:22,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 20:12:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:22,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:12:22,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:22,471 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 6 treesize of output 7 [2023-12-02 20:12:22,497 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 15 treesize of output 1 [2023-12-02 20:12:22,513 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 19 treesize of output 11 [2023-12-02 20:12:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:22,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:22,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121197549] [2023-12-02 20:12:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121197549] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:22,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:22,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:12:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999620381] [2023-12-02 20:12:22,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:22,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:12:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:22,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:12:22,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:12:22,527 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:22,963 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-12-02 20:12:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:12:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 20:12:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:22,965 INFO L225 Difference]: With dead ends: 63 [2023-12-02 20:12:22,965 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 20:12:22,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:12:22,966 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:22,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:12:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 20:12:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-02 20:12:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 58 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-12-02 20:12:22,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 20 [2023-12-02 20:12:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:22,969 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-12-02 20:12:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-12-02 20:12:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:12:22,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:22,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:22,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-12-02 20:12:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:23,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:23,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1447396367, now seen corresponding path program 1 times [2023-12-02 20:12:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:23,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028502625] [2023-12-02 20:12:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:23,173 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:23,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 20:12:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:23,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 20:12:23,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:23,321 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 6 treesize of output 5 [2023-12-02 20:12:23,377 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 11 treesize of output 7 [2023-12-02 20:12:23,389 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 15 treesize of output 1 [2023-12-02 20:12:23,417 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 17 treesize of output 9 [2023-12-02 20:12:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:23,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:23,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028502625] [2023-12-02 20:12:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028502625] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:12:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607700985] [2023-12-02 20:12:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:12:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:12:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:12:23,446 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:23,975 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-12-02 20:12:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:12:23,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 20:12:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:23,977 INFO L225 Difference]: With dead ends: 62 [2023-12-02 20:12:23,977 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 20:12:23,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:12:23,978 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:23,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 131 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:12:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 20:12:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-02 20:12:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-02 20:12:23,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 20 [2023-12-02 20:12:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:23,982 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-02 20:12:23,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-02 20:12:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:12:23,983 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:23,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:23,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 20:12:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:24,184 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:24,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -985382589, now seen corresponding path program 1 times [2023-12-02 20:12:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:24,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741231202] [2023-12-02 20:12:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:24,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:24,185 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:24,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 20:12:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:24,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:12:24,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:24,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:24,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741231202] [2023-12-02 20:12:24,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741231202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:24,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:24,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:12:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896190891] [2023-12-02 20:12:24,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 20:12:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 20:12:24,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:12:24,563 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:25,198 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-02 20:12:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:12:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 20:12:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:25,200 INFO L225 Difference]: With dead ends: 69 [2023-12-02 20:12:25,200 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 20:12:25,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:12:25,201 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:25,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 130 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 20:12:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 20:12:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2023-12-02 20:12:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 60 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2023-12-02 20:12:25,204 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 20 [2023-12-02 20:12:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:25,204 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2023-12-02 20:12:25,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:12:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2023-12-02 20:12:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:12:25,205 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:25,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:25,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-12-02 20:12:25,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:25,406 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:25,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash 621573974, now seen corresponding path program 1 times [2023-12-02 20:12:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:25,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641000655] [2023-12-02 20:12:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:25,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:25,407 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:25,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 20:12:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:25,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 20:12:25,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:25,594 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 6 treesize of output 7 [2023-12-02 20:12:25,731 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 20:12:25,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 20:12:25,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:12:25,897 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:25,898 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:12:25,911 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 27 treesize of output 15 [2023-12-02 20:12:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:25,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:12:25,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641000655] [2023-12-02 20:12:25,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641000655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:12:25,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:12:25,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 20:12:25,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902965436] [2023-12-02 20:12:25,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:12:25,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 20:12:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 20:12:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-02 20:12:25,949 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 13 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:26,771 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-12-02 20:12:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 20:12:26,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 20:12:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:26,772 INFO L225 Difference]: With dead ends: 66 [2023-12-02 20:12:26,772 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 20:12:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-02 20:12:26,773 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:26,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 20:12:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 20:12:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-12-02 20:12:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.446808510638298) internal successors, (68), 60 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2023-12-02 20:12:26,779 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 22 [2023-12-02 20:12:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:26,780 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2023-12-02 20:12:26,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2023-12-02 20:12:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:12:26,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:26,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:26,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-12-02 20:12:26,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:26,981 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:26,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 621573975, now seen corresponding path program 1 times [2023-12-02 20:12:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:26,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133371782] [2023-12-02 20:12:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:26,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:26,983 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:26,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 20:12:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:27,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 20:12:27,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:27,172 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 6 treesize of output 7 [2023-12-02 20:12:27,227 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 6 treesize of output 5 [2023-12-02 20:12:27,323 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:27,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:27,363 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 11 treesize of output 7 [2023-12-02 20:12:27,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:12:27,501 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:27,501 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:12:27,512 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 24 treesize of output 11 [2023-12-02 20:12:27,525 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 25 treesize of output 13 [2023-12-02 20:12:27,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:12:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:27,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:27,955 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_944 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_944) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd (_ bv16 64) .cse0) (bvadd (_ bv20 64) .cse0)))) (forall ((v_ArrVal_944 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_943 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv20 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_944) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_943) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))) is different from false [2023-12-02 20:12:28,039 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_944 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_943 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv20 64) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_944) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_943) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))) (forall ((v_ArrVal_944 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_944) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd .cse1 (_ bv16 64)) (bvadd (_ bv20 64) .cse1)))))) is different from false [2023-12-02 20:12:28,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:28,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 20:12:28,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:28,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 20:12:28,083 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 52 treesize of output 44 [2023-12-02 20:12:28,087 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 82 treesize of output 70 [2023-12-02 20:12:28,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 20:12:28,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 20:12:28,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:28,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 20:12:28,151 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 44 treesize of output 32 [2023-12-02 20:12:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:29,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133371782] [2023-12-02 20:12:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133371782] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963246420] [2023-12-02 20:12:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:29,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 20:12:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:29,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 20:12:29,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:29,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 20:12:29,851 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 6 treesize of output 5 [2023-12-02 20:12:29,896 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:29,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:29,914 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 11 treesize of output 7 [2023-12-02 20:12:29,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:12:29,968 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:29,968 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:12:29,974 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 24 treesize of output 11 [2023-12-02 20:12:29,993 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 25 treesize of output 13 [2023-12-02 20:12:30,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:12:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:30,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:30,121 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1011 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1011) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd .cse0 (_ bv16 64)) (bvadd (_ bv20 64) .cse0)))) (forall ((v_ArrVal_1011 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1010 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv20 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1011) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1010) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))) is different from false [2023-12-02 20:12:30,210 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_1011 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1011) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd (_ bv16 64) .cse0) (bvadd (_ bv20 64) .cse0)))) (forall ((v_ArrVal_1011 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1010 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv20 64) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1011) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1010) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))))) is different from false [2023-12-02 20:12:30,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:30,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 20:12:30,264 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 44 treesize of output 32 [2023-12-02 20:12:30,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:30,314 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 20:12:30,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:30,333 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 20:12:30,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:12:30,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 20:12:30,350 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:12:30,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 20:12:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963246420] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115973187] [2023-12-02 20:12:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:31,063 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:31,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 20:12:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:31,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 20:12:31,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:31,230 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 6 treesize of output 5 [2023-12-02 20:12:31,274 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:12:31,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:12:31,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:12:31,298 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 11 treesize of output 7 [2023-12-02 20:12:31,344 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:31,344 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 20:12:31,357 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 24 treesize of output 11 [2023-12-02 20:12:31,378 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 25 treesize of output 13 [2023-12-02 20:12:31,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:12:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:31,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:31,535 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1077 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1077) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd .cse0 (_ bv16 64)) (bvadd .cse0 (_ bv20 64))))) (forall ((v_ArrVal_1077 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1076 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1077) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) (_ bv20 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1076) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))) is different from false [2023-12-02 20:12:31,616 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_1077 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1076 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1077) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) (_ bv20 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1076) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))) (forall ((v_ArrVal_1077 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1077) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (bvule (bvadd .cse1 (_ bv16 64)) (bvadd .cse1 (_ bv20 64))))))) is different from false [2023-12-02 20:12:31,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:31,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 20:12:31,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:31,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 20:12:31,653 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 52 treesize of output 44 [2023-12-02 20:12:31,656 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 82 treesize of output 70 [2023-12-02 20:12:31,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 20:12:31,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 20:12:31,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:31,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 20:12:31,717 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 44 treesize of output 32 [2023-12-02 20:12:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115973187] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:32,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:32,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 13, 12, 13] total 24 [2023-12-02 20:12:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365997085] [2023-12-02 20:12:32,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:32,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 20:12:32,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 20:12:32,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=305, Unknown=6, NotChecked=234, Total=600 [2023-12-02 20:12:32,423 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 20:12:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:35,011 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-12-02 20:12:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 20:12:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-12-02 20:12:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:35,013 INFO L225 Difference]: With dead ends: 65 [2023-12-02 20:12:35,013 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 20:12:35,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=96, Invalid=522, Unknown=6, NotChecked=306, Total=930 [2023-12-02 20:12:35,014 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:35,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 395 Invalid, 0 Unknown, 222 Unchecked, 1.8s Time] [2023-12-02 20:12:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 20:12:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-02 20:12:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.425531914893617) internal successors, (67), 60 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-12-02 20:12:35,017 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 22 [2023-12-02 20:12:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:35,017 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-12-02 20:12:35,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 20:12:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-12-02 20:12:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 20:12:35,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:35,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:35,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 20:12:35,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 20:12:35,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 20:12:35,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:35,619 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:35,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash 568886048, now seen corresponding path program 1 times [2023-12-02 20:12:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:35,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495182901] [2023-12-02 20:12:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:35,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:35,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:35,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 20:12:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:35,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 20:12:35,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:35,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:36,013 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 20:12:36,013 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 24 treesize of output 23 [2023-12-02 20:12:36,034 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 20:12:36,035 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 12 [2023-12-02 20:12:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:36,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495182901] [2023-12-02 20:12:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495182901] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106444746] [2023-12-02 20:12:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:36,047 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:36,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 20:12:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:36,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 20:12:36,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:36,393 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 19 treesize of output 1 [2023-12-02 20:12:36,395 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 19 treesize of output 1 [2023-12-02 20:12:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:36,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:36,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106444746] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:36,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042435913] [2023-12-02 20:12:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:36,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:36,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:36,869 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:36,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 20:12:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:36,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 20:12:36,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:37,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:37,124 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 20:12:37,125 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 24 treesize of output 23 [2023-12-02 20:12:37,143 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 20:12:37,143 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 12 [2023-12-02 20:12:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042435913] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:37,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 13, 8, 8, 8] total 19 [2023-12-02 20:12:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632982877] [2023-12-02 20:12:37,157 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 20:12:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 20:12:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:12:37,158 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:38,431 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-12-02 20:12:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:12:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-12-02 20:12:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:38,433 INFO L225 Difference]: With dead ends: 84 [2023-12-02 20:12:38,433 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 20:12:38,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-12-02 20:12:38,433 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:38,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 301 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 20:12:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 20:12:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2023-12-02 20:12:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 68 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2023-12-02 20:12:38,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 23 [2023-12-02 20:12:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:38,436 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2023-12-02 20:12:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:12:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2023-12-02 20:12:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 20:12:38,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:38,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:38,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2023-12-02 20:12:38,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 20:12:38,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 20:12:39,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:39,038 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:39,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash 455596858, now seen corresponding path program 1 times [2023-12-02 20:12:39,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:39,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21866160] [2023-12-02 20:12:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:39,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:39,040 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:39,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 20:12:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:39,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 20:12:39,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:39,391 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~l#1.base_22| (_ BitVec 64))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_22|) (_ bv0 1)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_22| (_ bv0 1))))) is different from true [2023-12-02 20:12:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-02 20:12:39,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:41,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:41,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21866160] [2023-12-02 20:12:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21866160] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:41,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441576016] [2023-12-02 20:12:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:41,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:41,730 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:41,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 20:12:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:42,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 20:12:42,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:42,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441576016] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188859216] [2023-12-02 20:12:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:44,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:44,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:44,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 20:12:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:44,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 20:12:44,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:44,907 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~l#1.base_28| (_ BitVec 64))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_28|) (_ bv0 1)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_28| (_ bv0 1)) |c_#valid|))) is different from true [2023-12-02 20:12:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-02 20:12:44,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188859216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:12:47,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:12:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2023-12-02 20:12:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966863477] [2023-12-02 20:12:47,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 20:12:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 20:12:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=205, Unknown=3, NotChecked=58, Total=306 [2023-12-02 20:12:47,192 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:48,201 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2023-12-02 20:12:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 20:12:48,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-02 20:12:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:48,202 INFO L225 Difference]: With dead ends: 79 [2023-12-02 20:12:48,202 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 20:12:48,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=68, Invalid=317, Unknown=3, NotChecked=74, Total=462 [2023-12-02 20:12:48,203 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:48,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 184 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 120 Unchecked, 0.9s Time] [2023-12-02 20:12:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 20:12:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-12-02 20:12:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.5) internal successors, (72), 61 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-12-02 20:12:48,205 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 24 [2023-12-02 20:12:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:48,205 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-12-02 20:12:48,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-12-02 20:12:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:12:48,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:48,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:48,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2023-12-02 20:12:48,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-12-02 20:12:48,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-02 20:12:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:48,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:48,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash 91452393, now seen corresponding path program 1 times [2023-12-02 20:12:48,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:48,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534170920] [2023-12-02 20:12:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:48,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:48,809 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-12-02 20:12:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:48,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:12:48,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:49,057 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-02 20:12:49,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 20:12:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:49,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534170920] [2023-12-02 20:12:49,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534170920] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:49,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159714629] [2023-12-02 20:12:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:49,082 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:49,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:49,083 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:49,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2023-12-02 20:12:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:49,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 20:12:49,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:49,519 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-02 20:12:49,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 20:12:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159714629] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:49,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858366826] [2023-12-02 20:12:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:49,553 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:49,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 20:12:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:49,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:12:49,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:49,780 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-02 20:12:49,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 20:12:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:12:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858366826] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:49,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 6 [2023-12-02 20:12:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682041911] [2023-12-02 20:12:49,798 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:12:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:12:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:12:49,800 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:50,300 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-12-02 20:12:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:12:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 20:12:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:50,302 INFO L225 Difference]: With dead ends: 73 [2023-12-02 20:12:50,302 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 20:12:50,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:12:50,303 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:50,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:12:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 20:12:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-12-02 20:12:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-12-02 20:12:50,305 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 28 [2023-12-02 20:12:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:50,306 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-12-02 20:12:50,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:12:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-12-02 20:12:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:12:50,307 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:50,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:50,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2023-12-02 20:12:50,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2023-12-02 20:12:50,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 20:12:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:50,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:50,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash 91452394, now seen corresponding path program 1 times [2023-12-02 20:12:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:50,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361489686] [2023-12-02 20:12:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:50,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:50,909 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:50,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-12-02 20:12:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:51,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 20:12:51,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:51,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:51,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:51,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-12-02 20:12:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:52,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:12:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361489686] [2023-12-02 20:12:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361489686] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710009457] [2023-12-02 20:12:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:12:52,607 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:12:52,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-02 20:12:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:52,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 20:12:52,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:53,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:53,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:53,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-12-02 20:12:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:53,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710009457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706939770] [2023-12-02 20:12:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:53,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:12:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:12:53,660 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:12:53,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 20:12:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:53,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 20:12:53,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:53,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:12:54,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:12:54,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-12-02 20:12:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:12:54,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706939770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:12:54,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:12:54,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2023-12-02 20:12:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625904290] [2023-12-02 20:12:54,450 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:12:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 20:12:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:12:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 20:12:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-02 20:12:54,451 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:12:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:12:56,337 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-12-02 20:12:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:12:56,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-12-02 20:12:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:12:56,339 INFO L225 Difference]: With dead ends: 72 [2023-12-02 20:12:56,339 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 20:12:56,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-12-02 20:12:56,340 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:12:56,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 20:12:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 20:12:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2023-12-02 20:12:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.471698113207547) internal successors, (78), 66 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:12:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-12-02 20:12:56,343 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 28 [2023-12-02 20:12:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:12:56,343 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-12-02 20:12:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:12:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-12-02 20:12:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 20:12:56,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:12:56,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:12:56,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 20:12:56,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2023-12-02 20:12:56,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2023-12-02 20:12:56,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:12:56,945 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 20:12:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:12:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1986449954, now seen corresponding path program 1 times [2023-12-02 20:12:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:12:56,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975199589] [2023-12-02 20:12:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:12:56,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:12:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:12:56,946 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:12:56,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-12-02 20:12:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:12:57,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 20:12:57,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:12:57,219 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 6 treesize of output 7 [2023-12-02 20:12:57,408 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 20:12:57,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 20:12:57,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:12:57,643 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:57,644 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:12:57,739 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:12:57,739 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:12:57,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 20:12:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:12:57,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:13:00,167 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 20:13:00,188 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1711 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1711))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 20:13:00,208 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1711 (Array (_ BitVec 64) (_ BitVec 64)))) (= (bvadd (_ bv1 1) (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1711))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (_ bv0 1))) is different from false [2023-12-02 20:13:00,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:00,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2023-12-02 20:13:00,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:00,244 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 152 treesize of output 139 [2023-12-02 20:13:00,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:00,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 86 [2023-12-02 20:13:00,281 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 78 treesize of output 74 [2023-12-02 20:13:07,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:13:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975199589] [2023-12-02 20:13:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975199589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:13:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262356695] [2023-12-02 20:13:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:13:07,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:13:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:13:07,372 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:13:07,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2023-12-02 20:13:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:13:07,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 20:13:07,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:13:07,879 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 6 treesize of output 7 [2023-12-02 20:13:08,333 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 20:13:08,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 20:13:08,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:13:08,719 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:13:08,719 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:13:08,887 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:13:08,888 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:13:09,171 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 27 treesize of output 15 [2023-12-02 20:13:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:13:09,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:13:09,397 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1781 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1781))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 20:13:09,416 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1781 (Array (_ BitVec 64) (_ BitVec 64)))) (= (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1781))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 20:13:09,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:09,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2023-12-02 20:13:09,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:09,458 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 268 treesize of output 243 [2023-12-02 20:13:09,470 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 187 treesize of output 179 [2023-12-02 20:13:09,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:09,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 175 [2023-12-02 20:13:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262356695] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:13:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482795391] [2023-12-02 20:13:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:13:17,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:13:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:13:17,763 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:13:17,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8891cc07-65bf-485f-b643-a6fa3e64bc5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 20:13:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:13:17,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 20:13:17,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:13:18,392 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 20:13:18,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 20:13:18,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:13:18,733 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:13:18,733 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:13:18,872 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:13:18,872 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 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 20:13:19,117 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 27 treesize of output 15 [2023-12-02 20:13:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:13:19,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:13:21,266 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1849 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1849))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 20:13:21,286 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1849 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1849))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1712)) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 20:13:21,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:21,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2023-12-02 20:13:21,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:21,325 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 268 treesize of output 243 [2023-12-02 20:13:21,337 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 187 treesize of output 179 [2023-12-02 20:13:21,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:13:21,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 175 [2023-12-02 20:14:11,519 WARN L293 SmtUtils]: Spent 49.39s on a formula simplification that was a NOOP. DAG size: 1430 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 20:14:11,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:11,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 294 treesize of output 3006